sentences:  By the year 939, Ngô Quyền became King, took the title Ngô Vương (Ngô King) and founded Vietnam's Ngô Dynasty with his capital at Cổ Loa (Today's Đông Anh, Hà Nội).General Trần Hưng Đạo reused this tactic in the Battle of Bạch Đằng (1288).He fully understood the requisites behind this tactic and applied them successfully by pushing a Mongol army out of the Bạch Đằng River.