Forty Years' War
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Was a military war fought between the Burmese-speaking Kingdom of Ava and the Mon-speaking Kingdom of Hanthawaddy.
Chronology
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January 1404: In 1403, Upper Burma was under attack by King Razadarit of Hanthawaddy. The Kingdom of Ava, led by King Minkhaung I, successfully defended against the invasion, leading to a truce being agreed upon between the two rulers.
January 1404: In 1403, Upper Burma was under the rule of King Razadarit and King Minkhaung I of Ava. Despite ongoing conflicts, Ava's defenses held strong, leading to both rulers agreeing to another truce that year.
January 1407: Ava expanded greatly between 1404 and 1406: it absorbed the Shan states of Kale and Mohnyin in the north, and Arakan in the west.
January 1409: In 1408, the Hanthawaddy Kingdom, led by King Razadarit, launched a military campaign to drive out the Ava Kingdom's forces from Arakan. This conflict was part of the ongoing power struggle between the two kingdoms for control over the region.
January 1413: Arakan becomes a tributary of Pegu.
January 1415: Ava king Minye Kyawswa defeated Hanthawaddy ruler Theinni and his Chinese allies in 1412. He invaded the Hanthawaddy country in full force in 1414, and conquered the Irrawaddy delta in 1415, forcing Razadarit to flee Pegu for Martaban.
April 1415: Ava crown prince Minye Kyawswa was killed in battle in March 1415. The Ava Army left the Irrawaddy delta.
January 1422: Arakan tributary of Pegu (1412-1421).
January 1403: Razadarit, the king of Hanthawaddy Kingdom, invaded Upper Burma in full force with a large flotilla in 1401.
