Ulanqatai

Uriyangkhadai (Modern Mongolian: Mongolian Cyrillic: Урианхадай, , , – ) was an Uriankhai general in the Mongol Empire who led several campaigns during the 13th century Mongol conquest of the Song dynasty in China, as well as the first Mongol invasion of Vietnam. He was the son of military strategist Subutai and father of Mongol general and chancellor Aju. He was a nephew of Jelme. A folk legend claimed that Subutai wished to die by his son Uriyangkhadai by the banks of the Danube river. According to Jean-Pierre Abel-Rémusat, he participated in the conquest of Kievan Rus', conquest of Poland, and conquests of Germanic lands before being sent to China. Uriyangkhadai had significantly more military experience than Kublai Khan and proved invaluable in battle. After the three successive envoys were imprisoned in Thang Long (modern-day Hanoi), the capital of the northern Vietnamese kingdom of Dai Viet, Uriyangkhadai invaded Đại Việt with generals Trechecdu and Aju in the rear. Around 17 November 1259 while besieging Ezhou in Hubei, Kublai Khan received a messenger who described Uriyangkhadai's army advances from Thang Long to Tanzhou (modern-day Changsha) in Hunan via Yongzhou (modern-day Nanning) and Guilin in Guangxi. Uriyangkhada's army subsequently fought its way north to rejoin Kublai Khan's army on the northern banks of the Yangtze river, after which both armies returned to northern China due to the succession crisis that emerged as a result of Möngke Khan's death at the Siege of Diaoyucheng on 11 August 1259.