When Pope Urban wanted to wage war against Muslims in the "holy land" Below is a map of the first crusade.
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Answer:
In 1279, Kublai became the first Mongol to rule all of China when he conquered the last of the Song loyalists. ... Despite adopting and improving on many Chinese systems and ideals, Kublai and his Mongols did not want to become Chinese – they kept many of their own customs and remained unassimilated to Chinese life