Royaume de Pagan
Since its founding in 1279 as an outpost of the Pagan Kingdom, Toungoo, located in a remote, hard-to-reach corner east of the Pegu Yoma (Bago Yoma) range, had always been a troublesome province for its overlord. During the Ava period, its governors and viceroys raised multiple rebellions (1427–1428, 1437–1442, 1451–1458, and 1468–1470), each time with clandestine or open help from Hanthawaddy, which wanted to keep Ava unstable.