What were the failures of the
Mongol's political empire?

Ultimately, though, the failure of their military campaigns became a key factor leading to the weakening and eventual demise of the Mongol empire in China. Among the failed campaigns were two naval campaigns against Japan — one in 1274 and one in 1281 — both of which turned into complete fiascos.

Explanation:

i think it's severe storms but i might be wrong