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Mayadunne was a king of Sitawake in Ceylon (now Sri Lanka) during the 16th century. He was an ambitious ruler who sought to expand his territory at the expense of his brother, the king of Kotte. Mayadunne's wars against his brother eventually transformed into a struggle against Portuguese influence on the island. After his death, his son Rajasinha continued the fight against the Portuguese, though he could not overcome their sea power. The Sitawake kingdom disintegrated after Rajasinha's death in 1593.1

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