Answer:
The Yuan Dynasty was eventually destroyed by the peasants' uprising. In 1351, the 'Hongjinjun (army with red head-scarves) Uprising', led by a man named Liu Futong, broke out in Yingzhou (in current Anhui Province). Fierce battles took place progressively between the Hongjinjun military force and the Yuan army.
Explanation:
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Austria used it as a flimsy excuse to start a war with Serbia, which it had been wanting to do anyway.