King Kyawswa of Pagan is overthrown by the three Myinsaing brothers, marking the de facto end of the Pagan Kingdom.

Kyawswa was king of the Pagan dynasty of Burma (Myanmar) from 1289 to 1297. Son of the last sovereign king of Pagan Narathihapate, Kyawswa was one of many "kings" that emerged after the collapse of the Pagan Empire in 1287. Though still styled as King of Pagan, Kyawswa's effective rule amounted to just the area around Pagan city. Felt threatened by the three brothers of Myinsaing, who were nominally his viceroys, Kyawswa decided to become a vassal of the Yuan dynasty, and received such recognition from the Yuan in March 1297. He was ousted by the brothers in December 1297 and killed, along with his son, Theingapati, on 10 May 1299.

The Myinsaing Kingdom also known as Myainsaing Regency was the regency that ruled central Burma (Myanmar) from 1297 to 1313. It was founded by three brothers—Athinkhaya, Yazathingyan and Thihathu from Myinsaing— and was one of many small kingdoms that emerged following the collapse of the Pagan Empire in 1287. Myinsaing successfully fended off the second Mongol invasion in 1300–1301, and went on to unify central Burma from Tagaung in the north to Prome (Pyay) in the south. The brothers' co-rule ended between 1310 and 1313, with the death of the two elder brothers Athinkhaya and Yazathingyan. In 1315, the central Burmese state split into two rival states of Pinya and Sagaing. Central Burma would not be reunified until the rise of Ava five decades later.

The Pagan kingdom, also known as the Pagan dynasty, was the first Burmese kingdom to unify the regions that would later constitute modern-day Myanmar. Pagan's 250-year rule over the Irrawaddy valley and its periphery laid the foundation for the ascent of Burmese language and culture, the spread of Bamar ethnicity in Upper Myanmar, and the growth of Theravada Buddhism in Myanmar and in mainland Southeast Asia.

December 17 is the 351st day of the year in the Gregorian calendar; 14 days remain until the end of the year.