Ava–Hanthawaddy War (1422–1423)

Ava–Hanthawaddy War (1422–1423)
Part of the Forty Years' War
Datec. February 1422c. January 1423
Location
Result

Treaty of Dagon

Territorial
changes
Status quo ante bellum
Belligerents
Ava Hanthawaddy Pegu
Commanders and leaders
Strength

1422

  • Ava Strike Force: 2 regiments (2,000 troops, 20 war boats)
  • Kyan's regiment

1422–1423

  • Army: 8 regiments (8,000 troops, 500 cavalry, 30 elephants)
  • Navy: 6 regiments (6,000 troops, 50 war boats)

1422

  • Dala Corps: 2 regiments

1422–1423

  • Ran's army: 4+ regiments
Casualties and losses
Total unknown Total unknown
See Ava–Hanthawaddy War (1422–1423) orders of battle for more information.

The Ava–Hanthawaddy War (1422–1423) (Burmese: အင်းဝ–ဟံသာဝတီ စစ် (၁၄၂၂–၁၄၂၃)) was the fourth major conflict of the Forty Years' War, fought between Ava and Hanthawaddy Pegu in present-day Myanmar. The war was precipitated by a succession crisis in Pegu, following the death of King Razadarit in 1421. King Thihathu of Ava initially intervened on behalf of Prince Binnya Kyan but later ended his involvement by forming an alliance with Crown Prince Binnya Ran.

The conflict began in early 1422 when Ava forces helped Kyan retake his fief of Dala. However, due to rampant looting by the Ava troops, Kyan quickly switched allegiance back to his brother, King Binnya Dhammaraza, and drove his former allies out. The Hanthawaddy power struggle soon resumed when Crown Prince Ran seized control of Dagon, and claimed Ava's southernmost district of Tharrawaddy. Thihathu responded by launching a larger, retaliatory invasion of the Irrawaddy Delta in November 1422. When Ava forces laid siege to Ran's "capital" of Dagon, Ran sued for peace, offering an alliance and a marriage of state to his sister, Princess Shin Saw Pu. Thihathu, primarily interested in restoring royal prestige and securing his border, accepted the terms and withdrew his forces in early 1423.

The peace was short-lived. Hanthawaddy was reunified under Ran's leadership by 1424, while Ava was plunged into a prolonged succession crisis following Thihathu's assassination in 1425. Ran exploited Ava's internal chaos by allying with the rebel vassal Toungoo and seizing Ava's southern districts of Tharrawaddy and Paungde by 1427. The allies subsequently pushed farther north by attacking Prome, starting the Ava–Hanthawaddy War (1430–1431).