The Age of Exploration
The voyages that remade the world map — from Prince Henry's caravels to the circling of the globe, every milestone sourced.
A timeline of the Age of Exploration, the century and a half in which European ships reached, mapped, and colonized much of the world. It runs from Prince Henry's African voyages and Dias rounding the Cape, through Columbus, da Gama, and the first circumnavigation, to the conquest of the Aztec and Inca empires and the vast, tragic transformations — the Columbian Exchange and the transatlantic slave trade — that followed. Every event is backed by content-verified sources from museums, national libraries, and scholarly references.
Events
- 1419–1460Reputable sourceWell documented
Prince Henry and the Portuguese Voyages
From about 1419 the Portuguese prince Henry, later called 'the Navigator,' sponsored a sustained program of exploration down the west coast of Africa. Gathering experts in navigation, cartography, astronomy, and shipbuilding — and using the nimble new caravel — his captains pushed ever further south in search of gold, trade, and a route around Africa.
Why it matters: Henry's methodical, state-backed voyages launched the European Age of Exploration and set Portugal on the path to the first global seaborne empire.
Sources - 1488Reputable sourceWell documented
Dias Rounds the Cape of Good Hope
In 1488 the Portuguese captain Bartolomeu Dias became the first European to sail around the southern tip of Africa, later named the Cape of Good Hope. His voyage proved that a sea trading route from Europe to the riches of Asia was possible.
Why it matters: Dias opened the door to the Indian Ocean, making the long-sought sea route to Asia suddenly within reach.
Sources - 1492Primary sourceWell documented
Columbus Reaches the Americas
Sailing west for Spain in search of a route to Asia, Christopher Columbus instead made landfall on 12 October 1492 in the Bahamas, where he encountered the Taíno people. Believing he had reached the Indies, he explored the Caribbean and returned to Spain to announce his 'discovery.'
Why it matters: Columbus's voyage opened permanent — and, for Native peoples, catastrophic — contact between Europe and the Americas, and began the European colonization of the hemisphere.
Sources - 1494Reputable sourceWell documented
The Treaty of Tordesillas
With Spain and Portugal both claiming newly reached lands, in 1494 the two crowns signed the Treaty of Tordesillas, drawing an imaginary line down the Atlantic Ocean. Everything to the west of it would fall to Spain, everything to the east to Portugal.
Why it matters: Two European kingdoms presumed to divide much of the world between them — a claim that shaped the map of colonial empires, including Portuguese Brazil, for centuries.
Sources - 1498Reputable sourceWell documented
Vasco da Gama Reaches India
Following Dias's route around Africa, in 1498 the Portuguese captain Vasco da Gama sailed on across the Indian Ocean and landed at Calicut (Kozhikode) on the coast of India — the first European to reach India by sea.
Why it matters: Da Gama's voyage opened a direct sea route to the spice markets of Asia, breaking the old overland monopolies and making Portugal a great trading power.
Sources - 1500Reputable sourceWell documented
Cabral Reaches Brazil
In 1500, leading a large fleet bound for India, the Portuguese commander Pedro Álvares Cabral swung far to the west and made landfall on the coast of Brazil, claiming it for Portugal before continuing on to Asia.
Why it matters: Cabral's landing gave Portugal its foothold in South America and brought Brazil — today the largest country in the Americas — into the Portuguese world.
Sources - 1519–1521Reputable sourceWell documented
Cortés and the Fall of the Aztec Empire
Landing in Mexico in 1519, the Spanish conquistador Hernán Cortés marched on the Aztec capital, Tenochtitlan. Exploiting local resentment of Aztec rule to raise thousands of Indigenous allies, and aided by a devastating smallpox epidemic, he besieged and destroyed the city in 1521.
Why it matters: The fall of the Aztec Empire founded Spain's vast American empire of New Spain and showed how a few Europeans, imported disease, and local divisions could topple a great civilization.
Sources- World History Encyclopedia. Hernán Cortés · reference
- 1532–1533Reputable sourceWell documented
Pizarro and the Fall of the Inca Empire
In 1532 Francisco Pizarro reached the Inca Empire, the largest state in the Americas, just as it was reeling from a civil war and from European disease. With a tiny force he seized and later executed the Inca ruler Atahualpa, then captured the capital, Cusco.
Why it matters: The conquest of the Inca handed Spain the silver-rich Andes and completed European domination of the two greatest American empires within a single generation.
Sources- World History Encyclopedia. Francisco Pizarro · reference
- 1534Reputable sourceWell documented
Jacques Cartier and New France
In 1534 the French navigator Jacques Cartier crossed the Atlantic and explored the Gulf of St Lawrence, and on later voyages sailed up the St Lawrence River deep into North America, claiming the land for France.
Why it matters: Cartier's voyages laid the basis for France's claims in North America — the beginnings of New France and, eventually, French Canada.
Sources - 1492 onwardReputable sourceWell documented
The Columbian Exchange
Columbus's voyages set off a vast, two-way transfer of plants, animals, people, and diseases between the Old World and the New, later named the Columbian Exchange. Maize, potatoes, and tomatoes spread to Europe, Asia, and Africa; wheat, horses, cattle, and sugar came to the Americas; and Old World germs such as smallpox and measles devastated Indigenous peoples who had no immunity.
Why it matters: The Columbian Exchange reshaped diets, economies, and populations across the whole planet — one of the most consequential transformations in human history.
Sources- World History Encyclopedia. Columbian Exchange · reference
- 1500s onwardReputable sourceWell documented
The Transatlantic Slave Trade
To work the plantations and mines of the Americas, European powers built a vast transatlantic trade in enslaved Africans. Over roughly three and a half centuries, an estimated twelve to eighteen million people were seized from Africa and shipped across the Atlantic in brutal conditions, with great numbers dying on the 'Middle Passage.'
Why it matters: The largest forced migration in history, the slave trade enriched Europe, built the plantation economies of the Americas, and inflicted centuries of suffering whose legacies endure.
SourcesRelated timelines- The American Civil War → — The trade that led to civil war
- 1609–1611Reputable sourceWell documented
Henry Hudson and the Northwest Passage
Between 1609 and 1611 the English navigator Henry Hudson, sailing first for Dutch and then for English backers, searched for a northern sea route to Asia. He explored the great river and bay that now bear his name before his mutinous crew set him adrift to die in 1611.
Why it matters: Hudson's voyages never found the fabled Northwest Passage, but they opened the way for Dutch and English colonization of northeastern North America.
Sources