Every Army That Tried to Destroy The Mongol Empire

A Vietnamese general drove iron stakes into a riverbed and waited for the tide. A sultan had Mongol messengers beheaded and mounted on the city gates. Nobody beat the Mongols by fighting like the Mongols, they won by finding the one condition where the system broke down and forcing the battle there. We break down every army that stopped the unstoppable: the prince who dismounted his cavalry so nobody could run, the former slaves who used the feigned retreat against its inventors, and the nation that let an empire capture its capital three times and still won the war. Which army actually broke them?