Ava–Hanthawaddy War (1430–1431)
| Ava–Hanthawaddy War (1430–1431) | |||||||||
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| Part of the Forty Years' War | |||||||||
Hanthawaddy and Toungoo forces converged on Prome | |||||||||
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| Belligerents | |||||||||
| Ava |
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| Commanders and leaders | |||||||||
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| Strength | |||||||||
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Ava
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Hanthawaddy
Toungoo
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| Casualties and losses | |||||||||
| Minimal | Minimal | ||||||||
| See Ava–Hanthawaddy War (1430–1431) orders of battle for more information. | |||||||||
The Ava–Hanthawaddy War (1430–1431) (Burmese: အင်းဝ–ဟံသာဝတီ စစ် (၁၄၃၀–၁၄၃၁)) was a military conflict fought between the northern Kingdom of Ava and the southern alliance consisting of the Kingdom of Hanthawaddy Pegu and the rebel state of Toungoo. This conflict was the fifth of the decades-long wars between Ava and Pegu, both located in present-day Myanmar. Ava was forced to cede its southernmost districts to Pegu in exchange for Pegu's withdrawal of support for Toungoo.
The war's origins stemmed from the prolonged civil war in Ava that began in 1426. Viewed as a usurper by many major vassals, Thado of Mohnyin, Ava's new king, faced multiple rebellions across the kingdom. In Ava's south, Governor Saw Lu Thinkhaya formed a southern alliance, backed by King Binnya Ran I of Hanthawaddy. While Thado was preoccupied by rebellions in central Ava, the alliance went on to seize Ava's southern districts: Tharrawaddy and Paungde by Hanthawaddy in 1427, and the five irrigated districts of Yamethin by Toungoo in 1428–1429.
The war formally began when the alliance laid siege to Prome, Ava's main southern fortress, in October 1430. Unwilling to wage a long southern campaign, Thado offered to negotiate directly with King Binnya Ran. After over three months of negotiations, both sides reached agreement in February 1431. Under the Treaty of Prome, Ava formally ceded Tharrawaddy and Paungde to Hanthawaddy while Pegu agreed to withdraw its support for Toungoo. Ran also married Princess Soe Min Wimala Dewi in a marriage of state, cementing the agreement.
The war established Hanthawaddy as the ascendant power in the immediate aftermath. Toungoo was isolated, becoming a Hanthawaddy protectorate in 1436. Ava remained politically fragmented throughout the 1430s, and did not regain Toungoo until 1441, and Tharrawaddy and Paungde until 1446.