sentences:  A period of unrest and rebellions among other conquered peoples followed and Tabinshwehti was assassinated in 1550.Tabinshwehti's brother-in-law, Bayinnaung, succeeded to the throne in 1550 and reigned 30 years, launching a campaign of conquest invading several states, including Manipur (1560) and Ayutthaya (1564).An energetic leader and effective military commander, he made Toungoo the most powerful state in Southeast Asia and extended his borders from Laos to Ayutthaya.