Lê Hoàn

Lê Hoàn ( 10 August 941 – 18 March 1005), commonly known as Emperor Đại Hành , was the first emperor from the Early Lê family, succeeding the Đinh family as rulers of Đại Cồ Việt.
He started his career as a commander in the army of the first Vietnamese emperor Đinh Bộ Lĩnh and rose to the position of commander-in-chief. Following the death of Đinh Bộ Lĩnh, Lê Hoàn became regent to Đinh Bộ Lĩnh's successor, the six-year-old Đinh Toan. Lê Hoàn deposed the boy, married his mother, the Empress Dowager Duong Van Nga, and in 980 proclaimed himself emperor. He retained the imperial capital at Hoa Lư and succeeded in warding off several invasions by the Chinese Song Dynasty, but paid them regular tribute with the aim of securing peaceful relations. When he died in 1005, the Lê Dynasty went into decline.