Tabinshwehti

Tabinshwehti, building on his father Minkyinyo's achievements, conquered the Mon kingdom of Pegu and other states, unifying much of Burma under Toungoo rule. He moved the capital to Pegu and established the Toungoo Empire as the dominant power in the region.

Tabinshwehti launched an invasion of the Ayutthaya Kingdom (Siam), capturing the capital and forcing the Siamese king to become a vassal. This campaign extended Toungoo influence into Southeast Asia and demonstrated Burmese military power.

Tabinshwehti was assassinated by his own bodyguard, a Mon nobleman named Smim Sawhtut, who then declared himself king. The assassination plunged the Toungoo Empire into a succession crisis and civil war, temporarily halting its expansion.