The Crusades
Two centuries of holy war for Jerusalem, fought and remembered very differently by Christians and Muslims
In 1095 Pope Urban II called the knights of Western Europe to march east and take Jerusalem back from Muslim rule. What followed was nearly two hundred years of invasion, massacre, negotiation, and betrayal that reshaped the eastern Mediterranean. This timeline follows the Crusades from the Byzantine defeat at Manzikert in 1071 through the fall of Acre in 1291, drawing on the chronicles of participants on every side and naming the atrocities each side committed.
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Events
- 26 August 1071Well documented
Reputable source · 2 sourceswhy?
Best source: Battle of Manzikert
The domain "worldhistory.org" is on our Reputable source registry.Byzantine Army Shattered at Manzikert
At Manzikert in Byzantine Armenia, the Seljuk sultan Alp Arslan destroyed an army led personally by Emperor Romanos IV Diogenes. Romanos fielded a force of conscripts and mercenaries, including Pechenegs, Uzes, and a Norman contingent under the unreliable Roussel de Bailleul. During the retreat a rival, Andronikos Doukas, spread a false rumor that the emperor had been killed, and the Byzantine line collapsed into a rout. Romanos, his horse killed under him and his sword hand wounded, was taken prisoner. The eyewitness chronicler Michael Attaleiates described the scene as being "like an earthquake," with the whole Roman army in flight and the empire itself seeming to teeter on collapse. Alp Arslan treated his prisoner with courtesy, even reportedly asking what Romanos would have done in his place, but the political fallout back in Constantinople was severe and the Anatolian frontier never fully recovered.
Why it matters: Manzikert opened Byzantine Anatolia, previously the empire's main recruiting ground and breadbasket, to permanent Turkish settlement and the rise of the Sultanate of Rum. The territorial and manpower losses that followed pushed Emperor Alexios I Komnenos, a generation later, to ask the West for military help, the appeal that Pope Urban II would answer at Clermont.
How we know: The main eyewitness account comes from Michael Attaleiates, a Byzantine official who accompanied the campaign, supplemented by the eleventh-century Scylitzes Chronicle's detailed narrative of Romanos's capture and treatment.
Location: Manzikert, Byzantine Armenia (modern Malazgirt, Turkey) · Byzantine commander: Emperor Romanos IV Diogenes (captured) · Seljuk commander: Sultan Alp Arslan · Result: Decisive Seljuk victory; Byzantine Anatolia opened to Turkish settlement
Sources- World History Encyclopedia. Battle of Manzikert · reference
- World History Encyclopedia. Byzantine Empire · reference
- March 1095Well documented
Reputable source · 2 sourceswhy?
Best source: Alexios I Komnenos
The domain "worldhistory.org" is on our Reputable source registry.Alexios I Appeals to the West for Mercenaries
By 1095 Byzantine emperor Alexios I Komnenos had spent over a decade fighting Normans in Greece and Pechenegs on the Danube while Seljuk Turks held most of Anatolia following Manzikert. Seeing an opportunity to recover lost territory, Alexios sent envoys to Pope Urban II, then holding a council at Piacenza, asking for western mercenaries to help him fight the Seljuks. He had already written directly to Count Robert of Flanders on similar terms. Alexios envisioned hired soldiers under Byzantine command, not an independent army marching to conquer Jerusalem for its own sake. The World History Encyclopedia's account of his reign is blunt about the mismatch between what he asked for and what arrived eighteen months later at Constantinople's gates.
Why it matters: This appeal is the direct trigger for Urban's call at Clermont later that same year. Alexios got his soldiers, but not the small mercenary force he wanted: he got the First Crusade, an independent western army with its own agenda that would soon clash with him over who controlled the cities it captured.
How we know: The appeal is recorded by the Byzantine princess and historian Anna Komnene in her Alexiad, and referenced by western chroniclers describing the background to the Council of Clermont.
Location: Council of Piacenza, northern Italy · Byzantine emperor: Alexios I Komnenos (r. 1081-1118) · What was requested: Western mercenary soldiers, not a mass crusade · Pope: Urban II (r. 1088-1099)
Sources- World History Encyclopedia. Alexios I Komnenos · reference
- World History Encyclopedia. Council of Clermont · reference
Related timelines- The Rise of Islam → · The Seljuk conquests that prompted Alexios's appeal followed centuries of Islamic expansion across the Near East
- 27 November 1095Well documented
Primary source · 2 sourceswhy?
Best source: Urban II: Speech at Clermont, 1095 (Robert the Monk version)
Cited as a "primary" source (no stronger domain match).Urban II Preaches the First Crusade at Clermont
At a council in Clermont, France, attended by 13 archbishops, 82 bishops, and 90 abbots, Pope Urban II delivered an open-air sermon calling on Western Christians to march to Jerusalem and free it from Muslim rule. According to Robert the Monk's version of the speech, Urban told the crowd to make the phrase "It is the will of God" their war cry in battle, and the assembly reportedly answered back with the shout that would become the crusaders' rallying cry, recorded in Latin as "Deus vult! Deus vult!" Urban promised that anyone who took up the cross would receive a full remission of their sins, an indulgence that no earlier pope had offered on this scale. The offer proved enormously popular with nobles and knights across Europe, tens of thousands of whom "took the cross" within months.
Why it matters: The Clermont indulgence became the template every later crusade copied, tying military service directly to the forgiveness of sin. It also set off a chain of consequences Urban never intended: a mass popular movement of poor pilgrims traveling alongside the knights he had actually wanted, with disastrous results within the year.
How we know: No single verbatim transcript of Urban's speech survives. Historians rely on several independent chronicle versions written within a decade or two of the event, including those by Robert the Monk, Fulcher of Chartres, Baldric of Dol, and Guibert of Nogent, which agree on the core content but differ in wording and detail.
Location: Clermont, central France · Pope: Urban II (r. 1088-1099) · Attendance: 13 archbishops, 82 bishops, 90 abbots, plus a large lay crowd · Key promise: Full remission of sins for participants
- spring-summer 1096Debated
Primary source · 2 sourceswhy?
Best source: The Rhineland Massacres of the First Crusade
Cited as a "primary" source (no stronger domain match).Crusaders Massacre Jewish Communities in the Rhineland
As crusading fervor spread through the Rhineland in 1096, armed bands, most notoriously one led by Count Emicho of Flonheim, attacked Jewish communities in Speyer, Worms, Mainz, Trier, and Cologne, demanding conversion or money and killing those who refused. The Hebrew chronicler Solomon bar Simson, writing decades later, recorded crusaders reasoning that they should "first avenge" themselves on the Jews in their midst before marching against Muslims abroad. The Christian chronicler Albert of Aachen offered a rare sympathetic account, writing that the crusaders rose "in a spirit of cruelty" against Jews scattered across the cities. Modern historians disagree on the underlying cause: some point to resentment over moneylending, others to apocalyptic religious fervor tied to Emicho's own messianic claims, and still others to a straightforward desire for plunder. More than 10,000 Jews are estimated to have been killed.
Why it matters: These massacres, unauthorized by the Church and condemned by contemporary bishops who tried and failed to shelter Jewish refugees, mark one of the first large-scale organized attacks on Jewish communities in medieval Europe and set a grim pattern that recurred with later crusades.
How we know: The main narrative source is the Hebrew-language Solomon bar Simson Chronicle, compiled around 1140 from earlier testimony, read alongside the Latin account of Albert of Aachen. Historians including Robert Chazan and Benjamin Kedar have debated the killings' causes using both traditions, and still disagree.
Region: Rhineland, Holy Roman Empire (Speyer, Worms, Mainz, Trier, Cologne) · Key perpetrator: Count Emicho of Flonheim · Estimated deaths: More than 10,000 · Scholarly dispute: Historians disagree on whether greed, religious apocalypticism, or vengeance for the Crucifixion best explains the killings
- 21 October 1096Well documented
Primary source · 2 sourceswhy?
Best source: First Crusade
Cited as a "primary" source (no stronger domain match).The People's Crusade Is Destroyed Near Nicaea
Before the professional knights had even organized, a mixed crowd of poor pilgrims, minor knights, and peasants set out for Jerusalem under the preacher Peter the Hermit and the knight Walter Sansavoir. Ill-equipped and forced to forage as they crossed Europe, they reached Constantinople in summer 1096, where the Byzantine princess and historian Anna Komnene described them as an unarmed multitude "more numerous than the sand or the stars," traveling with women and children. Alexios I, alarmed by their lack of discipline, shipped them across to Asia Minor as quickly as he could. Ignoring Byzantine warnings, they pushed toward Nicaea and were ambushed and annihilated by a Seljuk army under Kilij Arslan I on 21 October 1096.
Why it matters: The disaster showed both Alexios and the western leaders that popular religious enthusiasm, however sincere, could not substitute for a disciplined army. It also meant the professional crusader force that arrived later that year had no illusions about the difficulty of the campaign ahead.
How we know: Anna Komnene's Alexiad, written decades later by the emperor's daughter using Byzantine court records and her own memory of events, gives a Byzantine perspective on the group's arrival and Alexios's handling of them.
Leaders: Peter the Hermit and Walter Sansavoir ("the Penniless") · Location: Near Nicaea, Asia Minor · Seljuk commander: Kilij Arslan I · Result: Near-total destruction of the crusader force
Sources - 3 June 1098Well documented
Primary source · 2 sourceswhy?
Best source: The Siege and Capture of Antioch: Collected Accounts
Cited as a "primary" source (no stronger domain match).Crusaders Take Antioch After an Eight-Month Siege
Antioch, a heavily fortified city and one of Christianity's five patriarchal sees, resisted the crusader army for eight months starting in October 1097. The besiegers themselves suffered plague, famine, and desertions, and were in turn besieged by a relieving Muslim army from Mosul once they finally broke in. The city fell on 3 June 1098 after the Norman leader Bohemund of Taranto arranged for a sympathetic guard to open a tower gate at night. Bohemund then refused to hand the city back to Byzantine emperor Alexios I as the crusaders had earlier sworn, keeping it for himself instead and souring relations between the crusade and Constantinople for the rest of the campaign. A Christian account collected at Fordham University describes the desperate suffering inside the crusader camp during the siege alongside the eventual, hard-won breakthrough.
Why it matters: Antioch became the crusaders' first independent principality and the model for the Crusader States that followed: captured by force, held by a western noble rather than returned to Byzantium, and governed as an independent Latin lordship rather than a reconquered Byzantine province.
How we know: Two eyewitness Latin accounts survive: the anonymous Gesta Francorum, written by a participant in Bohemund's own contingent, and the chronicle of Raymond d'Aguiliers, chaplain to Raymond of Toulouse, both collected and translated in Fordham University's Internet Medieval Sourcebook.
Location: Antioch, Syria · Siege duration: October 1097 to June 1098 (about 8 months) · Key figure: Bohemund of Taranto, who kept the city for himself · Byzantine relations: Bohemund's refusal to return the city broke the crusaders' oath to Alexios I
- 15 July 1099Debated
Primary source · 2 sourceswhy?
Best source: Fulk of Chartres: The Capture of Jerusalem, 1099
Cited as a "primary" source (no stronger domain match).Crusaders Storm Jerusalem and Massacre Its Population
After a five-week siege, crusader forces under Godfrey of Bouillon breached Jerusalem's walls using siege towers built from timber brought by Genoese ships. Once inside, the crusaders killed most of the city's Muslim and Jewish inhabitants. Fulcher of Chartres, a chaplain who took part in the assault, wrote that in the temple of Solomon alone almost ten thousand were killed, and that "our feet were colored to our ankles with the blood of the slain," adding that neither women nor children were spared. Modern historians treat the highest medieval death tolls, some sources claim up to 70,000, as exaggerated; a contemporary Muslim source, Ibn al-Arabi, put the number closer to 3,000 out of a population of roughly 30,000. Godfrey of Bouillon was made the city's ruler, taking the title Advocate of the Holy Sepulchre rather than king.
Why it matters: The massacre became infamous on both sides of the religious divide and was remembered by Muslim chroniclers for generations, feeding into the ideological framing Saladin later used when he retook the city in 1187 and, notably, did not repeat the slaughter.
How we know: Fulcher of Chartres's account is a firsthand narrative by a participant in the siege, published in the Internet Medieval Sourcebook. Casualty figures are debated: Christian chroniclers gave inflated numbers for propaganda purposes, while modern historians rely on the more measured contemporary Muslim source Ibn al-Arabi for a lower, more plausible estimate.
Location: Jerusalem · Crusader leader: Godfrey of Bouillon · Casualty estimates: Christian sources claim 10,000-70,000; the Muslim source Ibn al-Arabi gives about 3,000 of a population of 30,000 · Aftermath: Godfrey of Bouillon made ruler of Jerusalem; founding of the Kingdom of Jerusalem
- 1098-1109Well documented
Reputable source · 2 sourceswhy?
Best source: Kingdom of Jerusalem
The domain "worldhistory.org" is on our Reputable source registry.The Crusader States Are Founded
In the wake of the First Crusade's conquests, its leaders divided their gains into four Crusader States, collectively called Outremer or the Latin East: the County of Edessa, founded in 1098 by Baldwin of Boulogne; the Principality of Antioch, held by Bohemund of Taranto; the Kingdom of Jerusalem, ruled first by Godfrey of Bouillon; and the County of Tripoli, established last, in 1109. The Kingdom of Jerusalem controlled a narrow coastal strip from Jaffa to Beirut, with major fiefdoms at Acre, Tyre, and Caesarea. Its king commanded a small standing garrison, initially around 300 knights and 2,000 infantry, and depended heavily on barons who held their own fortified lands and could refuse military service if they judged the king had broken faith with them. Trade routes running through these states drew merchants from Venice, Pisa, Genoa, and Marseille, who financed ships in exchange for quarters and trading rights in the new port cities.
Why it matters: The Crusader States were a permanent European settler presence in the Levant, not merely a raiding expedition, and their chronic shortage of manpower and constant internal bickering between independent-minded barons made them dependent on a steady stream of new crusaders from Europe for the rest of their existence.
How we know: The internal politics of the Kingdom of Jerusalem are described in detail by contemporary charters and by later chroniclers such as William of Tyre, summarized in the World History Encyclopedia's dedicated articles on the kingdom and the wider crusader movement.
The four states: County of Edessa (1098), Principality of Antioch (1098), Kingdom of Jerusalem (1099), County of Tripoli (1109) · First ruler of Jerusalem: Godfrey of Bouillon · Capital: Jerusalem · Structure: A weak king dependent on independent-minded barons and, later, the military orders
Sources- World History Encyclopedia. Kingdom of Jerusalem · reference
- World History Encyclopedia. Crusades · reference
- c. 1113-1120sWell documented
Reputable source · 2 sourceswhy?
Best source: Knights Templar
The domain "worldhistory.org" is on our Reputable source registry.The Templars and Hospitallers Become Warrior-Monks
Around 1119, the French knight Hugh of Payns and a handful of companions swore to protect Christian pilgrims traveling to Jerusalem and formed a brotherhood bound by monastic vows of poverty alongside their martial calling. In 1120 King Baldwin II of Jerusalem gave them his palace on the Temple Mount, the former Aqsa Mosque, known as the Temple of Solomon, which gave the order its name: the Knights Templar. A separate and older institution, the Hospital of St. John in Jerusalem, had been founded around 1080 by merchants from Amalfi to care for sick and poor pilgrims; it gained official papal recognition as a religious order in 1113 under its first master, the Blessed Gerard, and was reorganized into a fighting order after 1120 under Raymond du Puy. Both orders combined monastic discipline with professional soldiering, answered to no local lord or bishop, and became the best-trained and most consistently available troops in the Crusader States, given key castles and mountain passes to defend.
Why it matters: The military orders gave the perpetually undermanned Crusader States a standing professional force that did not depend on the feuding baronage, but their independence from royal command meant kings could not always rely on them to follow a unified strategy, a weakness that resurfaced at critical moments such as Hattin.
How we know: The founding of the Templars is described in later chronicles referencing the Council of Troyes in 1129, which gave the order its formal rule, while the Hospitallers' evolution from a charitable hospital to a military order is documented through papal recognition records summarized by the World History Encyclopedia.
Knights Templar founded: c. 1119, papal recognition 1129 · Knights Hospitaller founded: c. 1080 as a hospital; military order from 1120 · Templar founder: Hugh of Payns · Templar headquarters: The former Aqsa Mosque, Temple Mount, Jerusalem
Sources- World History Encyclopedia. Knights Templar · reference
- World History Encyclopedia. Knights Hospitaller · reference
- 24 December 1144Well documented
Reputable source · 2 sourceswhy?
Best source: Edessa
The domain "worldhistory.org" is on our Reputable source registry.Zangi Captures Edessa
Imad ad-Din Zangi, the independent Muslim ruler of Mosul and Aleppo, encircled Edessa and had his men undermine one of its defensive walls, which then collapsed. After a four-week siege the city fell on 24 December 1144, a victory Muslim writers called "the victory of victories." Western Christian residents were killed or sold into slavery, though eastern Christians were permitted to remain. Before the fall, Edessa's Christians had appealed to the West for help, an appeal the Syrian Christian writer Michael the Syrian later rendered in vivid, mournful language describing the city as "a moving sight covered with a black garment, drunk with blood." The Muslim chronicler Ibn al-Athir gave a very different account, framing the conquest as a triumphant restoration of Islamic rule.
Why it matters: Edessa's fall removed the first and most exposed of the four Crusader States and became the direct pretext for the Second Crusade, preached across Europe by Bernard of Clairvaux the following year.
How we know: Christian and Muslim chroniclers describe the same event in strikingly different tones: Michael the Syrian's lament survives in later Christian sources, while Ibn al-Athir's near-contemporary Arabic history frames it as a Muslim victory, illustrating how differently the two traditions record the same siege.
Location: Edessa (modern Urfa, Turkey) · Conqueror: Imad ad-Din Zangi, ruler of Mosul and Aleppo · Siege length: About 4 weeks · Consequence: Direct trigger for the Second Crusade
Sources - 25 October 1147Well documented
Reputable source · 2 sourceswhy?
Best source: Second Crusade
The domain "worldhistory.org" is on our Reputable source registry.The Second Crusade Collapses in Asia Minor
The Second Crusade was the first to be personally led by reigning kings, Conrad III of Germany and Louis VII of France, both responding to Bernard of Clairvaux's preaching after the fall of Edessa. Conrad's army marched first and was unprepared for the semi-arid steppe of Asia Minor, lacking food and underestimating travel time. At Dorylaion on 25 October 1147 Seljuk archers devastated the slow-moving Germans, wounding Conrad himself and forcing a retreat to Nicaea. Louis VII's French army, following behind, won a minor victory in December but was then badly beaten crossing the Cadmus Mountains on 7 January 1148 after its column became stretched out and lost contact between units. What remained of the western force limped toward the coast under the command of Knights Templar, having not yet even reached northern Syria, its original objective.
Why it matters: The disaster at Dorylaion and the Cadmus Mountains crippled the Second Crusade before its main objective was even attempted, and set the stage for the even more humiliating failure that followed at Damascus later that year.
How we know: The campaign's collapse is documented in western chronicle accounts of Conrad and Louis's marches, summarized in the World History Encyclopedia's detailed narrative of troop movements and casualties.
German commander: Conrad III (wounded, forced to retreat) · French commander: Louis VII of France · Key defeats: Dorylaion (25 October 1147) and the Cadmus Mountains (7 January 1148) · Preacher of the crusade: Bernard of Clairvaux
Sources- World History Encyclopedia. Second Crusade · reference
- World History Encyclopedia. Kingdom of Jerusalem · reference
- 28 July 1148Well documented
Reputable source · 2 sourceswhy?
Best source: Second Crusade
The domain "worldhistory.org" is on our Reputable source registry.The Siege of Damascus Fails After Four Days
With Edessa already destroyed beyond recovery, western leaders meeting at Acre chose Damascus as a new target instead, despite the city having previously been allied with the Kingdom of Jerusalem against other Muslim states. The crusader army arrived at Damascus on 24 July 1148 and began a siege, but after only four days the combination of strong defenses and a severe shortage of water for the attackers forced its abandonment. Conrad III suspected the defenders had bribed Christian residents to sabotage the siege from within; others blamed Byzantine interference. More likely, the defenders' determination and the approach of a large Muslim relief force sent by Nur ad-Din left the crusaders with too few men and supplies to continue. Conrad returned to Europe in September 1148, and Louis followed roughly six months later after a tour of the Holy Land.
Why it matters: The Second Crusade's total failure, achieving nothing after enormous cost and effort, was a shock across Europe and demonstrated how much harder the Holy Land had become to hold since the First Crusade's improbable success half a century earlier.
How we know: The siege's collapse and the contemporary rumors of bribery and betrayal are described in the World History Encyclopedia's synthesis of chronicle accounts from both the Christian and Muslim sides.
Location: Damascus · Siege length: 4 days (24-28 July 1148) · Muslim relief commander: Nur ad-Din · Result: Total failure; Second Crusade achieves none of its objectives
Sources- World History Encyclopedia. Second Crusade · reference
- World History Encyclopedia. Edessa · reference
- 1169-1186Well documented
Reputable source · 2 sourceswhy?
Best source: Saladin
The domain "worldhistory.org" is on our Reputable source registry.Saladin Unifies Egypt and Syria
Saladin (Salah ad-Din), who had risen to power in Fatimid Egypt, claimed the Ayyubid sultanate on the death of his patron Nur ad-Din in 1174 and took Damascus that same year. Positioning himself as the defender of Sunni Orthodoxy, he removed the Shiite caliph in Cairo and governed according to strict Islamic law, a claim that carried real weight with the wider Muslim world. He then set about forging a coalition from the fractured city-states and rival rulers of Egypt and Syria, capturing Aleppo in 1183 and gaining control of Mosul by 1185, while securing a treaty with the Byzantine Empire against their common Seljuk enemy. With his flanks secure and Frankish leadership in the Kingdom of Jerusalem distracted by disputes over royal succession, Saladin judged the moment right to move against the Crusader States directly.
Why it matters: No single Muslim ruler had controlled both Egypt and Syria simultaneously since Nur ad-Din, and Saladin's coalition-building gave him the combined military resources to challenge the Crusader States in a way none of his predecessors could, setting up the catastrophic defeat the Franks suffered at Hattin.
How we know: Saladin's consolidation of power is documented by his own court biographers as well as by later historians drawing on Arabic chronicle sources, summarized in the World History Encyclopedia's account of his rise.
Title: Sultan of Egypt and Syria (r. 1174-1193) · Dynasty founded: Ayyubid · Key gains: Damascus (1174), Aleppo (1183), Mosul (1185) · Religious stance: Self-styled defender of Sunni Orthodoxy
Sources- World History Encyclopedia. Saladin · reference
- World History Encyclopedia. Battle of Hattin · reference
- 4 July 1187Well documented
Primary source · 2 sourceswhy?
Best source: Battle of Hattin
Cited as a "primary" source (no stronger domain match).Saladin Annihilates the Frankish Army at Hattin
Saladin's mounted archers spent 3 July 1187 harassing the marching Franks with hit-and-run attacks. The decisive engagement came the next day near the Horns of Hattin, where Saladin fielded roughly 20,000 troops against Guy of Lusignan's 15,000 infantry and 1,300 knights. Cut off from water and further tormented as the Muslim army set fire to dry grass and brush around them, the Frankish infantry formation broke apart, leaving the heavy cavalry without its usual protective screen. A breakout attempt by Raymond of Tripoli succeeded, but the rest of the army was surrounded. The thirteenth-century Arab historian Abu Shama recorded how Frankish knights, nearly invulnerable in their armor while mounted, became easy captives the moment their horses were killed. Guy of Lusignan was captured and later ransomed; Reynald of Chatillon, who had broken a truce by raiding Muslim caravans, was executed personally by Saladin. Any captured Templars and Hospitallers were also executed, since Saladin considered their military skill and religious devotion too dangerous to ransom.
Why it matters: Hattin destroyed the Kingdom of Jerusalem's field army in a single afternoon and captured the True Cross, the kingdom's holiest relic, leaving the Crusader States with almost no means to defend their remaining cities. Jerusalem itself fell within months.
How we know: The battle's tactics and outcome are described by the Arab historian Ibn al-Athir and by Abu Shama's account of Frankish military vulnerability once dismounted, both cited in modern syntheses of the campaign.
Location: Horns of Hattin, near Tiberias · Muslim force: About 20,000 under Saladin · Frankish force: About 15,000 infantry, 1,300 knights under Guy of Lusignan · Captured relic: The True Cross
Sources - September 1187Well documented
Reputable source · 2 sourceswhy?
Best source: Saladin
The domain "worldhistory.org" is on our Reputable source registry.Saladin Retakes Jerusalem, and Spares Its People
With the Kingdom of Jerusalem's army destroyed at Hattin, Saladin swept up Acre, Tiberias, Caesarea, Nazareth, and Jaffa in quick succession, leaving Tyre as the only significant city still in Frankish hands. Jerusalem itself, nearly undefended, surrendered in September 1187. Unlike the crusaders in 1099, Saladin did not order a mass killing: most of the city's Christian population was ransomed or enslaved rather than massacred, and eastern Christians were permitted to remain. All the city's churches except the Holy Sepulchre were converted into mosques. Saladin's restraint, deliberately publicized, became central to his reputation among both Muslim and later western writers as a chivalrous and merciful conqueror.
Why it matters: Jerusalem's fall ended 88 years of crusader rule and provoked the Third Crusade, bringing Richard the Lionheart, Philip II of France, and Frederick Barbarossa into direct conflict with Saladin. The contrast with 1099's massacre also shaped how each conquest was remembered for centuries afterward.
How we know: Saladin's treatment of Jerusalem's population is recorded by his own court biographers, who deliberately emphasized his clemency as part of a broader campaign to build his reputation as the ideal Muslim ruler.
Location: Jerusalem · Ruler at time of capture: Guy of Lusignan (Kingdom of Jerusalem) · Treatment of population: Ransomed or enslaved, not massacred; contrast with 1099 · Consequence: Direct cause of the Third Crusade
Sources- World History Encyclopedia. Saladin · reference
- World History Encyclopedia. Knights Hospitaller · reference
- 10 June 1190Well documented
Reputable source · 2 sourceswhy?
Best source: Third Crusade
The domain "worldhistory.org" is on our Reputable source registry.The Third Crusade Launches, and Barbarossa Drowns
Pope Gregory VIII called for a new crusade after Jerusalem's fall, and three of Europe's most powerful rulers took up the cross: Frederick I Barbarossa, Holy Roman Emperor, Philip II of France, and Richard I of England. Frederick, the most militarily experienced of the three, led a large army overland through Anatolia and won a battle against the Seljuks along the way, but drowned crossing the Saleph River in Cilicia on 10 June 1190, apparently after being swept away while trying to cross or bathe. Much of his army, deprived of its leader, disintegrated or turned back, and only a fraction reached the Holy Land. Philip II sailed separately with an army of 650 knights and 1,300 squires. Richard I, soon to be called "the Lionheart" for his battlefield conduct, became the campaign's dominant figure by default.
Why it matters: Barbarossa's death removed the crusade's most capable and experienced military leader before the fighting in the Levant had even begun, leaving Richard I to carry the campaign largely alone and shaping the entire character of the Third Crusade around his particular strengths and limitations.
How we know: Frederick's drowning and its effect on his army's cohesion are described in the World History Encyclopedia's narrative of the Third Crusade's opening stages, drawing on western chronicle accounts of the German contingent's march.
Crusade leaders: Frederick I Barbarossa, Philip II of France, Richard I of England · Barbarossa's death: Drowned crossing the Saleph River, Cilicia, 10 June 1190 · Effect: German army largely disintegrated after his death · Result: Richard I becomes the crusade's dominant leader
Sources- World History Encyclopedia. Third Crusade · reference
- World History Encyclopedia. Saladin · reference
- 20 August 1191Well documented
Reputable source · 2 sourceswhy?
Best source: The Siege of Acre, 1189-91 CE
The domain "worldhistory.org" is on our Reputable source registry.Richard I Takes Acre, Then Executes 2,500 Prisoners
Acre had already been under siege for roughly two years by the time Richard I and Philip II arrived with reinforcements in June 1191. Richard's siege engines, cash incentives paid to sappers who undermined the city's landward walls, and divisions within Saladin's own army combined to force a surrender on 12 July 1191, capturing 70 ships along with the city, most of Saladin's remaining navy. According to legend Richard, possibly ill with scurvy, had himself carried to the walls on a stretcher to fire his crossbow at the defenders. On 20 August 1191, Richard ordered over 2,500 prisoners, including women and children, executed outside the city walls after negotiations over their ransom and the return of the True Cross stalled. The bound captives were killed with swords, lances, and stones while some of Saladin's remaining troops attempted, unsuccessfully, to intervene.
Why it matters: The massacre at Acre is one of the starkest atrocities of the entire crusading era committed by a crusader leader still celebrated in the West as chivalrous, and it stood in direct contrast to Saladin's own more restrained treatment of prisoners at Jerusalem four years earlier.
How we know: The massacre is described in the World History Encyclopedia's detailed account of the siege, which notes that Richard's own contemporaries offered competing justifications, from the delayed ransom payment to the practical danger of leaving armed men behind his line of march.
Location: Acre, Kingdom of Jerusalem · City fell: 12 July 1191 · Prisoners executed: Over 2,500 (some sources say up to 3,000), including women and children · Date of massacre: 20 August 1191
Sources - 2 September 1192Well documented
Reputable source · 2 sourceswhy?
Best source: Third Crusade
The domain "worldhistory.org" is on our Reputable source registry.Richard and Saladin Sign the Treaty of Jaffa
Marching toward Jaffa on 7 September 1191, Richard's army fought a running battle at Arsuf against Saladin's harassing cavalry and archers, keeping the coast on one flank to limit its exposure. An unauthorized cavalry charge, possibly begun by the Knights Hospitaller, broke the Muslim lines, and the crusaders won the field, though Saladin's army escaped largely intact. Richard advanced twice to within sight of Jerusalem's walls over the following year but on both occasions judged his depleted army too weak to hold the city against an inevitable counterattack, a judgment shared by the commanders of the Templars and Hospitallers. After retaking Jaffa from a surprise Muslim assault in August 1192, Richard negotiated a peace settlement with Saladin. Under the Treaty of Jaffa, signed 2 September 1192, the crusaders dismantled the fortress of Ascalon and kept only a narrow strip of coastline around Acre, while Christian pilgrims were guaranteed safe access to Jerusalem's holy sites.
Why it matters: Richard's decision not to besiege Jerusalem, made twice, ended any realistic prospect the Third Crusade would restore the city to Christian rule, and no later crusader army ever came as close again. The treaty's pilgrim-access clause, however, gave the crusading movement a face-saving outcome to justify years of enormous cost.
How we know: The battle at Arsuf and the negotiated settlement are described in the World History Encyclopedia's account of the campaign's final year, drawing on the movements and decisions of both the crusader and Ayyubid leadership.
Battle of Arsuf: 7 September 1191, crusader victory · Treaty of Jaffa signed: 2 September 1192 · Key terms: Ascalon dismantled; narrow coastal strip near Acre kept by crusaders; pilgrim access to Jerusalem guaranteed · Outcome: Jerusalem remains under Muslim control
Sources - 12 April 1204Well documented
Reputable source · 2 sourceswhy?
Best source: 1204: The Sack of Constantinople
The domain "worldhistory.org" is on our Reputable source registry.The Fourth Crusade Sacks Christian Constantinople
Unable to pay the Venetians for its ships, the Fourth Crusade first diverted to sack the Christian city of Zara on the Dalmatian coast in November 1202, earning the crusaders excommunication. It then turned toward Constantinople at the urging of Doge Enrico Dandolo, ostensibly to install the exiled claimant Alexios IV Angelos on the Byzantine throne. When Alexios failed to deliver the money and support he had promised and was murdered by a usurper, the crusaders attacked the city directly. On 12 April 1204 they broke through Constantinople's sea walls, and a slaughter of the city's roughly 400,000 inhabitants followed: citizens were raped and killed, buildings burned, and churches desecrated over three days of looting in which artworks were destroyed, precious goods melted down, and religious relics carried back to Europe. The Partitio Romaniae treaty then divided the Byzantine Empire between Venice and its allies, with Count Baldwin of Flanders crowned the first Latin Emperor of Constantinople in the Hagia Sophia.
Why it matters: The sack devastated the wealthiest and most artistically significant city in the Christian world and permanently poisoned relations between the Latin West and Orthodox East. Though a Byzantine successor state recaptured the city in 1261, the empire never recovered its former wealth or reach, leaving it fatally weakened when the Ottoman Turks arrived two centuries later.
How we know: The Fourth Crusade's diversion from Jerusalem to Constantinople is documented by participant chroniclers including Geoffrey of Villehardouin, and is summarized in detail in the World History Encyclopedia's account of the campaign's political maneuvering and the sack itself.
Location: Constantinople · Key instigator: Doge Enrico Dandolo of Venice · Population at time: Approximately 400,000 · Outcome: Byzantine Empire divided; Latin Empire of Constantinople established (1204-1261)
SourcesRelated timelines- The Byzantine Empire → · The sack of Constantinople is the single most catastrophic event in Byzantine history, examined in full in the Byzantine Empire timeline
- spring-summer 1212Debated
Primary source · 2 sourceswhy?
Best source: The Children's Crusade: A Change of Interpretation Over Time
Cited as a "primary" source (no stronger domain match).The "Children's Crusade" Ends in Disaster and Legend
In 1212 two popular religious movements arose independently, one in France led by a shepherd boy named Stephen of Cloyes, who claimed Jesus Christ had personally handed him a letter instructing him to preach a crusade, and one in Germany led by a boy named Nicholas of Cologne. An early chronicle, the Chronicae regiae Coloniensis continuatio prima, described "many thousands of pueri, from six years of age to full manhood," setting out for Jerusalem with banners raised, though the Latin term pueri could mean children, adolescents, or simply common people rather than literal young children. An estimated 20,000 set out across Germany and France toward Genoa, hoping, according to legend, that the Mediterranean would part for them as the Red Sea had for Moses. Many died crossing the Alps from hunger, and when survivors reached Genoa without money for passage, the movement collapsed; accounts disagree on whether the rest returned home, were sold into slavery, or scattered along the Mediterranean coast.
Why it matters: Historians remain divided on whether this was ever really a movement of children at all, given how confused and inconsistent the medieval sources are, and the episode has been reinterpreted by every subsequent century to fit its own image of what the Crusades meant, from 19th-century nostalgia for pious chivalry to modern readings of it as an absurd and exploitative tragedy.
How we know: No participant account survives; the episode is known only from around fifty external chronicle references written by people who did not take part, ranging from a few sentences to half a page, which is why historians Andrew Latham and Liam Athas and others describe the reliable facts behind it as essentially unrecoverable.
French leader: Stephen of Cloyes, a shepherd · German leader: Nicholas of Cologne · Estimated participants: About 20,000 (contested; likely included adults, not only children) · Scholarly status: Not an official Church-sanctioned crusade; details heavily disputed
- 28 August 1221Well documented
Reputable source · 2 sourceswhy?
Best source: Fifth Crusade
The domain "worldhistory.org" is on our Reputable source registry.The Fifth Crusade Surrenders on the Flooded Nile
Rather than attack the Levant directly, the Fifth Crusade targeted Egypt first, reasoning that Jerusalem would fall on its own if cut off from Egyptian support. The crusader army, led in the field by John of Brienne, king of Jerusalem, captured the fortress city of Damietta in November 1219 after a grueling siege. The Egyptian sultan al-Kamil then offered to trade Jerusalem itself for a crusader withdrawal from Egypt, an offer John of Brienne and the Teutonic Knights wanted to accept but which the Templars, Hospitallers, and the campaign's senior cleric, Cardinal Pelagius, rejected as unsustainable without key fortresses al-Kamil intended to keep. The crusaders pressed on toward Cairo instead. Al-Kamil sank ships behind the advancing army to block retreat, positioned troops to cut off any escape by land, and then opened the Nile's sluice gates, flooding the surrounding fields waist-deep. Trapped and waterlogged, the crusader army surrendered on 28 August 1221, forfeiting Damietta and all its gains.
Why it matters: The rejection of al-Kamil's offer to trade Jerusalem for Egypt is one of the great missed opportunities of the entire crusading era, and the campaign's collapse in the Nile floodwaters became a byword for crusading overreach and poor logistics.
How we know: The campaign's leadership disputes and its final collapse are described in detail in the World History Encyclopedia's narrative, which draws on chronicle accounts of the negotiations between Cardinal Pelagius and al-Kamil.
Location: Damietta and the Nile Delta, Egypt · Field commander: John of Brienne, King of Jerusalem · Senior cleric: Cardinal Pelagius · Result: Crusader surrender, 28 August 1221; Damietta returned to Egypt
Sources- World History Encyclopedia. Fifth Crusade · reference
- World History Encyclopedia. Sixth Crusade · reference
- 18 February 1229Well documented
Reputable source · 2 sourceswhy?
Best source: Sixth Crusade
The domain "worldhistory.org" is on our Reputable source registry.Frederick II Negotiates Jerusalem's Return
Holy Roman Emperor Frederick II had repeatedly delayed his promised crusade, prompting Pope Gregory IX to excommunicate him in September 1227. Undeterred, Frederick sailed anyway and landed at Acre in September 1228, still excommunicate, which meant the Templars and Hospitallers felt they could not officially serve under him and had to be given nominally separate commanders. Rather than fight, Frederick negotiated directly with the Egyptian sultan al-Kamil. On 18 February 1229 the two signed the Treaty of Jaffa, under which Jerusalem was returned to Christian control, though the Temple Mount remained under Muslim religious authority and resident Muslims retained the right to visit on pilgrimage. No new fortifications or construction were permitted at the holy sites. In exchange, al-Kamil received a ten-year truce and Frederick's promise to defend him against all enemies, including fellow Christians. Al-Kamil faced criticism from Muslims across the region for the concession, even as Frederick's own excommunication meant his triumph brought him no credit from the Church that had sent him.
Why it matters: The Sixth Crusade achieved by treaty what five previous armed crusades had failed to accomplish by force, but Jerusalem's return proved temporary: the city fell again in 1244, and no crusader force would ever recapture it after that.
How we know: The treaty's specific terms and the criticism al-Kamil received from fellow Muslim rulers are recorded in the World History Encyclopedia's detailed account of the negotiations and their aftermath.
Negotiators: Holy Roman Emperor Frederick II and Sultan al-Kamil of Egypt · Treaty signed: 18 February 1229 (Treaty of Jaffa) · Key term: Jerusalem returned to Christian rule; Temple Mount stays under Muslim authority · Jerusalem held until: 1244
Sources- World History Encyclopedia. Sixth Crusade · reference
- World History Encyclopedia. Sixth Crusade · reference
- April 1250Well documented
Reputable source · 2 sourceswhy?
Best source: Seventh Crusade
The domain "worldhistory.org" is on our Reputable source registry.Louis IX Is Captured at Mansourah
King Louis IX of France launched the Seventh Crusade in 1248 after Jerusalem had again fallen to Muslim forces in 1244. His army captured Damietta in June 1249 with surprising ease after an amphibious landing, but rather than press the advantage while the Egyptian sultan al-Salih lay dying, Louis waited for reinforcements led by his brother Alphonse, giving the Egyptians time to regroup under the Bahri Mamluk commander Fakhr al-Din. When Louis finally advanced toward Cairo in late 1249, the crusader army was routed at Mansourah in 1250. Louis himself was captured along with much of his remaining force and was eventually ransomed, along with the surrender of Damietta, for a vast sum. Despite the disaster, Louis remained in the Levant for four years afterward, refortifying key Latin strongholds including Acre before finally returning to France.
Why it matters: Louis's capture repeated, almost exactly, the earlier disaster of the Fifth Crusade at the same stretch of the Nile, underlining how consistently the strategy of attacking Egypt as the "soft underbelly" of Muslim power had failed for Christian armies over three decades.
How we know: The campaign and Louis's captivity are documented in the World History Encyclopedia's narrative account, which also notes his subsequent four-year residence in the Crusader States rebuilding their defenses.
Crusade leader: King Louis IX of France · Damietta captured: June 1249 · Defeat and capture: Mansourah, 1250 · Outcome: Louis ransomed; remained in the Levant until 1254
Sources- World History Encyclopedia. Seventh Crusade · reference
- World History Encyclopedia. Eighth Crusade · reference
- February 1258Well documented
Primary source · 2 sourceswhy?
Best source: The Mongols Besiege and Capture Baghdad in 1258
Cited as a "primary" source (no stronger domain match).The Mongols Sack Baghdad
Before invading Mesopotamia, the Mongol prince Hulagu, grandson of Genghis Khan, demanded the Abbasid caliph al-Musta'sim submit and recognize Mongol overlordship, warning through his envoys that "everyone who has been recalcitrant in obeying us has been annihilated along with his women, children, kith and kin, towns, and servants." The caliph's belated attempts to negotiate came too late. Hulagu's forces besieged and captured Baghdad in February 1258, sacking the city and killing the caliph along with a large portion of its population, ending the Abbasid Caliphate's five-century-old seat of authority. Some Crusader-aligned forces in the region, including Bohemond VI of Antioch, allied with the Mongols against common Muslim rivals during this period, a pragmatic alliance that Pope Alexander IV explicitly forbade the wider Crusader States from joining.
Why it matters: Baghdad's destruction eliminated the Islamic world's traditional central religious authority and left a power vacuum the Mamluks of Egypt would move to fill within two years, a rivalry that reshaped the balance of power the remaining Crusader States depended on for survival.
How we know: Hulagu's ultimatum survives in Persian chronicle sources translated and hosted at deremilitari.org, the website of the Society for Medieval Military History, which preserves the caliph's failed negotiation attempts alongside the Mongol demand for submission.
Location: Baghdad, Abbasid Caliphate · Mongol commander: Hulagu Khan, grandson of Genghis Khan · Caliph killed: Al-Musta'sim · Crusader-Mongol relations: Bohemond VI of Antioch allied with the Mongols; Pope Alexander IV forbade wider cooperation
- 3 September 1260Well documented
Primary source · 2 sourceswhy?
Best source: The Battle of 'Ayn Jalut (1260)
Cited as a "primary" source (no stronger domain match).The Mamluks Stop the Mongols at Ain Jalut
After Hulagu's Mongols captured Baghdad, Aleppo, and Damascus, Hulagu sent envoys to Cairo demanding the Mamluk sultan Qutuz submit. Qutuz had the envoys killed and their heads displayed on the city gates. Hulagu then withdrew most of his army back east to contest the succession after the death of the Great Khan Mongke, leaving a reduced force under his deputy Kitbuqa to continue the campaign. Roughly 20,000 Mamluk troops, including the general Baibars, met a similarly sized Mongol force at Ain Jalut in Palestine on 3 September 1260. The Mamluks drew the Mongol cavalry into a feigned retreat, nearly buckled under the resulting counterattack, then rallied with cavalry hidden in the surrounding valleys. Kitbuqa was captured and executed. On the return march to Cairo, Baibars murdered Qutuz and took the sultanate for himself.
Why it matters: Ain Jalut was the first major battle the Mongol Empire lost after decades of westward conquest, and it stopped their advance into Egypt permanently. Baibars, its new sultan, would spend the next decade methodically conquering the remaining Crusader States, including Antioch in 1268.
How we know: The battle is recorded in Persian chronicle material hosted at deremilitari.org, and corroborated by the World History Encyclopedia's account of Baibars's subsequent seizure of power and campaigns against the Latin East. The two sources give the battle date as either 3 or 8 September 1260, a minor discrepancy in an otherwise consistent record.
Location: Ain Jalut, Palestine · Mamluk sultan: Qutuz (killed shortly after by Baibars) · Mongol commander: Kitbuqa (captured and executed) · Aftermath: Baibars becomes Mamluk sultan and later conquers Antioch (1268)
- 25 August 1270Well documented
Reputable source · 2 sourceswhy?
Best source: Eighth Crusade
The domain "worldhistory.org" is on our Reputable source registry.Louis IX Dies of Dysentery Outside Tunis
Twenty years after his capture in Egypt, Louis IX of France launched a second crusade in 1270, this time aiming first at Tunis in North Africa as a staging point for a future assault on Egypt. His son John Tristan and much of the army were struck down by disease and lack of clean water in the summer heat at their camp near Carthage. Louis himself contracted dysentery, and after a month of illness he died on 25 August 1270. According to legend, though not according to the confessor actually present at his deathbed, his final words were "Jerusalem! Jerusalem!" Charles of Anjou took command after Louis's death and negotiated a withdrawal from the Emir of Tunis in exchange for the release of Christian prisoners and a large payment of gold. A storm then wrecked much of the returning fleet off Sicily, and the crusade dissolved without ever reaching the Holy Land.
Why it matters: The Eighth Crusade's collapse from disease before a single major battle was fought marked one of the bleakest outcomes of the entire crusading era, and it was the last crusade any French king would personally lead to the East.
How we know: Louis's illness and death are described in the World History Encyclopedia's account of the campaign, including the detail, explicitly flagged as legend rather than fact, that his confessor did not record the famous last words attributed to him.
Location: Near Carthage, Tunis · Cause of death: Dysentery · Date of death: 25 August 1270 · Successor commander: Charles of Anjou
Sources- World History Encyclopedia. Eighth Crusade · reference
- World History Encyclopedia. Sixth Crusade · reference
- 18 May 1291Well documented
Primary source · 2 sourceswhy?
Best source: The Siege of Acre, 1291 CE
Cited as a "primary" source (no stronger domain match).Acre Falls, Ending the Crusader States
Mamluk Sultan Khalil marched on Acre with an army of roughly 45,000 and around 100 siege catapults, including one so large it took a month and 100 carts to haul it from Krak des Chevaliers. Acre's defenders, numbering around 1,000 knights and 14,000 infantry from local forces, pilgrims, and the Templars, Hospitallers, and Teutonic Knights, held out through April and early May. By early May there were barely enough men to cover the full length of the walls, and King Henry's offer to negotiate was refused: Khalil wanted total victory. On 18 May, after Mamluk sappers had already collapsed several towers, a final assault began with continuous bombardment and 300 drummers riding camels to signal the attack. The historian T. Asbridge called the barrage "unlike anything yet witnessed in the field of Crusader warfare." The city fell into chaos; those who reached the harbor in time escaped by ship, while many others were killed or enslaved. A garrison of Templars held out in their fortified quarter for another ten days before being captured and executed.
Why it matters: Acre's fall ended the Crusader States founded in 1099, closing out nearly two centuries of continuous Christian rule in the Levant. Sultan Khalil then systematically destroyed the remaining coastal cities and even the region's orchards and irrigation systems specifically to prevent any future crusade from using them.
How we know: A contemporary eyewitness account preserved by the World History Encyclopedia describes individual acts of resistance during the final assault, including the Hospitaller marshal Mathew of Claremont's defense of a breached gate, alongside the historian T. Asbridge's assessment of the unprecedented scale of the Mamluk bombardment.
Location: Acre · Mamluk sultan: Khalil · Defenders: About 1,000 knights, 14,000 infantry, including the Templars, Hospitallers, and Teutonic Knights · Result: City falls; end of the Crusader States founded in 1099
Sources