Key Facts
- Duration
- 1510–1599
- Peak area
- ~1,550,000 km²
- Peak population
- ~6 million
- Largest empire in
- History of Southeast Asia (at peak)
- Founded from
- Principality of Toungoo, vassal of Ava until 1510
Imperial Zenith Metrics
Territorial Scale Comparison
Peak area vs modern sovereign states
Historical Trajectory
Phase I: Rise
The empire grew from Toungoo, a landlocked minor vassal of the Ava kingdom. Under Tabinshwehti in the 1530s, the principality launched aggressive military expansion, and by 1550 had become the largest polity in Myanmar since the Pagan kingdom. His successor Bayinnaung extended these gains further, conquering much of mainland Southeast Asia and reaching peak territorial extent by 1565.
Phase II: Zenith
At its height under Bayinnaung, the empire exercised suzerainty from Manipur to the Cambodian marches and from the borders of Arakan to Yunnan, constituting the largest empire in Southeast Asian history. Bayinnaung spent years suppressing rebellions in Siam, Lan Xang, and the Shan states, and from 1576 declared influence over trans-Manipur states, Arakan, and Ceylon.
Phase III: Decline
Held together largely by patron-client relationships, the empire began collapsing after Bayinnaung's death in 1581. His successor Nanda Bayin failed to secure full loyalty from vassal rulers, and the overextended empire disintegrated within 18 years. Its two main successor states—Restored Toungoo Burma and Ayutthaya Siam—divided mainland Southeast Asia between them and endured into the mid-18th century.
Notable Imperial Reigns
Selected rulers mapping the empire’s trajectory