He was born in a Yurt and was the grandson of Genghis Khan.
hehehehe i have a grandkid now, he gon' rule something
Because he was the grandson of Genghis, he got a small portion of northern china to rule over.
I promote thee. My dude of the far land of Northern China.
With his brother becoming Khan of the mongol empire, he was promoted and asked to conquer southern china and the Song dynasty
dang it
After his brother died and he'd retreated, he went back and conquered the song and battled his brother for the title of "The Great Khan"
I told you i would win dude
After claiming the title of "great khan," Kublai Khan conquered the rest of southern china with fighting with tactics that they learned from the Persians.
He then declared the start of the Yuan Dynasty in 1271