大理国
The Mongol attacks on Southern Song China intensified with the election of Möngke as Great Khan in 1251. Passing through the Chengdu Plain in Sichuan, the Mongols conquered the Kingdom of Dali in modern Yunnan in 1253. The Mongols besieged Ho-chiou and lifted the siege very soon in 1254. Möngke's brother Kublai and general Uriyangkhadai pacified Yunnan and Tibet and invaded the Trần dynasty in Vietnam.