Gongmin of Goryeo vs Ivan Asen I of Bulgaria

Gongmin purged pro-Yuan officials and abolished Mongol-style institutions, reasserting Goryeo's independence. He also reclaimed territories in the northwest, ending decades of Mongol domination.

Gongmin's Mongol wife, Queen Noguk, died during childbirth, though rumors of poisoning circulated. Her death deeply affected Gongmin, leading to his withdrawal from governance and increased reliance on Buddhist monks.

Gongmin implemented land reforms to reduce the power of Mongol-aligned nobles and redistribute land to peasants and loyal officials. This weakened Yuan influence and strengthened the central government.

Gongmin was assassinated by his close attendant Hong Ryun and other conspirators, possibly due to his erratic behavior and neglect of state affairs. His death plunged Goryeo into political chaos.

Ivan Asen I, along with his brother Peter, led a rebellion of Bulgarians and Vlachs against Byzantine rule. The uprising began after the brothers demanded a pronoia (land grant) from Emperor Isaac II Angelos and were refused. They proclaimed the restoration of the Bulgarian Empire, sparking a war that would eventually liberate much of Bulgaria.

Ivan Asen I and his brother Peter proclaimed the restoration of the Bulgarian Empire in the city of Tarnovo. They declared themselves emperors (tsars), claiming continuity from the First Bulgarian Empire. This act established the Second Bulgarian Empire, with Tarnovo as its capital. The proclamation was accompanied by the consecration of a new patriarch.

Ivan Asen I's forces ambushed and defeated a Byzantine army under Emperor Isaac II Angelos in the Tryavna Pass. The Byzantines were caught in a narrow mountain pass and suffered heavy losses. This victory secured Bulgarian control over the Balkan Mountains and forced the Byzantines to recognize the Second Bulgarian Empire's existence.

Ivan Asen I was assassinated by his cousin Ivanko, who had been accused of plotting against him. The murder occurred during a hunting trip. Ivanko briefly seized power but was soon overthrown by Peter, Ivan's brother. This assassination destabilized the new empire and led to a period of internal conflict among the Asen dynasty.