The Battle of Naungyo (Burmese: နောင်ရိုးတိုက်ပွဲ [nàʊɰ̃jó taɪʔpwɛ́]) was a land battle fought between the armies of the Toungoo Kingdom and Hanthawaddy Kingdom during the Toungoo–Hanthawaddy War (1534–41) in late 1538. The battle was the most decisive Toungoo victory of the war. Toungoo armies led by Gen. Kyawhtin Nawrahta (later Bayinnaung) decisively defeated a numerically far superior and better armed force of Hanthawaddy led by Gen. and Gen. . Only a small portion of the Hanthawaddy forces made it to their intended destination–the fortified city of Prome (Pyay). A decimated Hanthawaddy was no longer in a position to retake the lost territories from Toungoo.