Forty Years' War

Forty Years' War
Date1385–1423
Location
Primarily in Lower Burma
also in Upper Burma, Arakan, Shan States
Result

Stalemate

  • Pegu preserves independence
  • Arakan tributary of Pegu (1412–1421)
Territorial
changes
No long-term changes
Belligerents

Ava

Hanthawaddy Pegu

Commanders and leaders
Swa Saw Ke
Tarabya
Thilawa
Minkhaung I
Minye Kyawswa 
Thihathu

Razadarit
Byat Za
Dein Mani-Yut
Lagun Ein 
Smin Bayan
Binnya Ran I

Min Saw Mon or Min Khayi

The Forty Years' War (Burmese: အနှစ်လေးဆယ်စစ်; 1385 – 1423; also Ava–Pegu War or the Mon–Burmese War) was a military war fought between the Burmese-speaking Kingdom of Ava and the Mon-speaking Kingdom of Hanthawaddy. The war was fought during two separate periods: 1385 to 1391, and 1401 to 1424, interrupted by two truces of 1391–1401 and 1403–1408. It was fought primarily in today's Lower Burma and also in Upper Burma, Shan State, and Rakhine State. It ended in a stalemate, preserving the independence of Hanthawaddy, and effectively ending Ava's efforts to rebuild the erstwhile Pagan Kingdom.