Bayinnaung

Bayinnaung Kyawhtin Nawrahta; 16 January 1516 – 10 October 1581), personal name [[Burmese honorfic|Maung]Yeh Htut (ရှင်ရဲထွတ်), was King of Burma from 30 April 1550 until his death in 1581, during the Toungoo dynasty. His reign is considered one of the most momentous in Burmese history, famously described as "the greatest explosion of human energy ever seen in Burma". During his rule, he assembled the largest empire in Southeast Asian history, which encompassed much of present-day Myanmar, as well as the Shan States, Lan Na, Lan Xang, Manipur, and the Ayutthaya Kingdom.

Though best remembered for his empire-building, Bayinnaung's most enduring legacy was the integration of the Shan States into the Irrawaddy valley administrative system. After conquering the Shan States between 1557 and 1563, he implemented a series of administrative reforms aimed at reducing the power of hereditary rulers, known as saophas, and aligning Shan governance and customs with lowland Burmese norms. These reforms effectively eliminated the persistent threat of Shan raids into Upper Burma, a source of instability since the 13th century. Bayinnaung's integration policy served as a model for successive Burmese monarchs, who continued his approach until 1885.

However, Bayinnaung largely followed the prevailing Mandala administrative model across his vast and culturally diverse empire. His rule over the First Toungoo Empire was described as "an emperor without an empire" holding control through personal allegiance to Bayinnaung as a Chakravartin (Universal Monarch) from it sub-kingdoms, rather than to any institutions. While this loyalty endured during his lifetime, it rapidly unraveled after his death in 1581. Both the kingdoms of Ava and Ayutthaya revolted within just over two years, and by 1599, all vassal states had declared independence, resulting in the complete collapse of the empire.

Bayinnaung is regarded as one of the three greatest Burmese monarchs and is commemorated with major landmarks in his name in modern Myanmar. He is also well known in Thailand, where he is remembered as "Conqueror of the Ten Directions". Despite being a former adversary of Ayutthaya, his influence in Thai historical consciousness stands as a testament to the scale and power of his reign.