However, Trịnh Khải organized an army and fought against his half-brother and destroyed all her supporters.
His mother was Đặng Thị Huệ who undertook a war to retain his place as king, but her armies were defeated by warlord Trịnh Khải.
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In 1782 as Trịnh Sam was dying, he tried to leave control over Vietnam to his son (from his favorite concubine, Đặng Thị Huệ), Trịnh Man, but his rightful heir, Trịnh Khai organized an army and fought against his half-brother.