Typhoons Wreck Two Mongol Invasion Fleets
Kublai Khan sends thousands of ships against Japan twice, and both times a storm finishes what samurai and stone walls started
Quick facts
- First invasion
- 1274 CE, c. 800-900 ships
- Second invasion
- 1281 CE, c. 4,400 ships, c. 100,000 men
- Defenses
- 19 km of stone walls around Hakata Bay (built 1275)
- Storm name
- Kamikaze ("divine wind")
What happened
Kublai Khan dispatched a fleet of some 800 to 900 ships from Korea in November 1274, and on 20 November a storm struck that killed up to a third of the Mongol force and severely damaged the fleet before it could establish a foothold. After that first invasion, Japan built massive stone fortifications around Hakata Bay in 1275, some 19 kilometers long, sloped on the inner side to let mounted archers fire over them while presenting a sheer outer face to attackers. Kublai Khan returned in 1281 with a far larger force, roughly 4,400 ships and around 100,000 men gathered partly from the newly conquered Song navy. On 14 August a typhoon destroyed most of this fleet, wrecking ships that had been tied together for mutual defense against Japanese raiding parties; this time the walls also held, and the invaders could not establish a permanent beachhead. The storms were named kamikaze, "divine winds," credited by contemporaries to the war god Hachiman answering Japan's prayers.
Why it matters
The kamikaze storms became a foundational national myth mixing divine favor with samurai heroism, one still recognizable centuries later when Japan's military reused the name kamikaze for its suicide pilots in the Second World War. Modern lake-sediment and shipwreck evidence in Imari Bay has independently confirmed that unusually large storms did strike Kyushu at the right times, giving the legend a real geological basis.
How we know
Geologist Jon Woodruff's team examined lake sediments near Kyushu containing storm-deposited debris carbon-dated to align with the invasion years, while divers recovered wrecked ships and Mongol-era artifacts in Imari Bay confirming the fleets themselves.
Sources
- National Geographic. Japan's Kamikaze Winds, the Stuff of Legend, May Have Been Real · Reputable sourcenationalgeographic.com · The domain "nationalgeographic.com" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- World History Encyclopedia. The Mongol Invasions of Japan, 1274 & 1281 CE · Reputable sourceworldhistory.org · The domain "worldhistory.org" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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Related timelines
- The Mongol Empire → · See the wider Mongol Empire timeline for Kublai Khan's conquest of Song China and the naval power behind these invasion fleets.