 In 1258, a Mongol column under Uriyangkhadai, the son of Subutai, invaded Đại Việt.According to Vietnamese sources, the Mongol army consisted of at least 30,000 soldiers of which at least 2,000 were Yi troops from the Dali Kingdom.Modern scholarship points to a force of several thousand Mongols, ordered by Kublai to invade with Uriyangkhadai in command, which battled with the Viet forces on 17 January 1258.