Mongol leader Genghis Khan (1162-1227) rose from humble beginnings to establish the largest land empire in history. After uniting the nomadic tribes of the Mongolian plateau, he conquered huge chunks of central Asia and China. ... Genghis Khan died in 1227 during a military campaign against the Chinese kingdom of Xi Xia.
Unifying the Mongols was no small achievement — it meant bringing together a whole series of disparate tribes. Economically the tribal unit was optimal for a pastoral-nomadic group, but Chinggis brought all the tribes together into one confederation, with all its loyalty placed in himself.
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Caused World War One to be inevitable because the alliance system caused France to help Russia to help Serbia with the allied powers. With the Central Powers, Germany had a “blank check” alliance with Austria-Hungary, which meant that Germany promised to join in any war that Austria-Hungary wanted them to. This caused Germany to help Austria-Hungary against Serbia. Italy also joined in, but then switched sides due to the promise of land and tense relations with the Central Powers.
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