They fought/ conquered Northern china/ the jin dynasty and there leader at that time was Genghis khan.They chose to fight the jin dynasty, which were there enemies, because when they asked for crops and food they denied there request so they fought for food.The jin dynasty fought hard but unfortunately the mongols fought even harder and took women and children as shields. At the end, the mongols ended up winning this battle.
They fought/conquered in the Persian empire and the mongols leader at this time was Genghis khan. when they traveled to the Persian empire they were stopped by the governor and he thought that they were spies so the governor wanted them to be killed so when Genghis khan heard about this he saw this as unforgivable. This battle went good for the mongols but not for the Persian empire and what happened was that the mongols destroyed many cities especially rich ones and destroyed a lot more and also the goner that started this whole thing ran away on an island and died. The mongols also won this battle.
They fought/conquered southern china/ the song dynasty and the leader at this time was kublai khan aka Genghis khans grandson. Kublai felt that it was time for them to take uncharge of all of china. They used advanced weapons and they aimed for the wall and they took it down. The mongols won.
The mongols conquered/fought Japan and the leader at that time was kublai Khan. These fights began because the leaders of Japan refused to submit to the Mongols after the arrival of Mongol ambassadors in Japan and also they put a hot piece of metal on the ambassadors faces. They were stopped by a hurricane and then after that they gave up on there goal. The Japanese won and the mongols were defeated.