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During the First Mongol invasion of Burma, the fort at Ngasaunggyan was overrun after a two-month siege.
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First Mongol invasion of Burma
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The first Mongol invasions of Burma were a series of military conflicts between Kublai Khan's Yuan dynasty, a division of the Mongol Empire, and the Pagan Empire that took place between 1277 and 1287. The invasions toppled the 250-year-old Pagan Empire, and the Mongol army…Source: Wikipedia (CC BY-SA)
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