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Entry 119 of 240War

The Crusades

1096–1291 CE/Near East/Latin Christendom / Islam
Today The Eastern Mediterranean (Jerusalem and the Levant)Span The Crusades · 1096–1291 CE

Summoned by the Pope, waves of European Christians marched east over two centuries to seize the Holy Land from Muslim rule, capturing Jerusalem in 1099 with a violence remembered on both sides, before being gradually driven out, most famously by the sultan Saladin. The Crusades hardened the divide between Christendom and Islam — but they also reopened trade and carried Islamic and Greek learning in mathematics, medicine, and philosophy back to a Europe hungry for it. They show an ideological movement mobilizing whole societies for war while quietly enriching the very culture it set out to fight.

◆ Worth knowingThe Crusaders founded an order of warrior-monks, the Knights Templar, to guard pilgrims — and by guarding their money too, the Templars built what amounted to Europe's first international bank, letting a traveler deposit coin in Paris and withdraw it in Jerusalem.
◆ The mechanismIdeological movement

A belief system rises, spreads, institutionalizes, and then schisms — changing the rules people accept as legitimate.

Also: Trade-route shift · Military-technological disruption

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