sentences:  Bayinnaung was poised to deliver a final, decisive assault on the kingdom of Arakan when he died in 1581.His son Nanda Bayin and his successors were forced to quell rebellions in other parts of the kingdom, and the victory over Arakan was never achieved.Faced with rebellion by several cities and renewed Portuguese incursions, the Toungoo rulers withdrew from southern Burma and founded a second dynasty at Ava, the Nyaungyan or Restored Taungoo Dynasty (1597–1752).