Ma Sein of Toungoo

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Ma^{[note 1]} Sein (Burmese: မစိန်, Burmese pronunciation: [maʔ sèiɴ]) was a Hanthawaddy commander who occupied Toungoo (Taungoo) for three months in 1375−76. The ethnic Mon commander was posted in Toungoo by King Binnya U of Hanthawaddy upon request of Viceroy Pyanchi I of Toungoo in order to raise a rebellion against Ava. His army was in charge of Toungoo in 1375 when Pyanchi I was assassinated near Prome (Pyay) by pro-Ava forces.^[1] The commander claimed the state of Toungoo on behalf of Hanthawaddy, and resisted the subsequent siege by Pyanchi I's son Pyanchi II and son-in-law Sokkate for three months. He was put to death when the siege was broken three months later.^[2][3]

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• Sein Lwin Lay, Kahtika U (2006) [1968]. Mintaya Shwe Hti and Bayinnaung: Ketumadi Taungoo Yazawin (in Burmese) (2nd printing ed.). Yangon: Yan Aung Sarpay.