King Wonjong of Goryeo vs Narathihapate

King Wonjong sent his son (future King Chungnyeol) as a hostage to the Mongol court and agreed to Goryeo becoming a vassal state of the Mongol Empire. This ended decades of military resistance and established a tributary relationship that lasted for nearly a century.

After the death of King Gojong, Wonjong returned from the Mongol court where he had been held as a hostage. He was installed as king with Mongol approval, marking the beginning of direct Mongol influence over Goryeo's throne.

King Wonjong ordered the dissolution of the Sambyeolcho, a elite military unit that resisted Mongol domination. The Sambyeolcho rebelled and held out on Jeju Island until 1273, when Mongol-Goryeo forces crushed them, ending organized military opposition to Mongol rule.

Kublai Khan's Mongol forces invaded the Pagan Empire after King Narathihapate refused to pay tribute. The Mongols defeated the Pagan army and sacked the capital, Bagan. Narathihapate fled south, and the empire collapsed, leading to a period of political fragmentation.

As the Mongol army approached Bagan, King Narathihapate abandoned the capital and fled to the southern city of Prome. His flight demoralized his forces and left the empire defenseless, earning him the epithet 'Taruk-Pye' (the king who fled from the Chinese).

After fleeing to Prome, King Narathihapate was assassinated by his own son, Thihathu, who sought to seize power. The assassination marked the end of the Pagan dynasty and plunged Burma into a period of civil war and fragmentation.