Lý Thánh Tông
As Champa constantly harassed the area near the border between the two nations and sometimes intruded deeply to loot, in 1069 Lý Thánh Tông himself led an seaborne invasion of Champa. He defeated the Cham army, burned Vijaya, and captured the king of Champa, Rudravarman III on Khmer territories. Rudravarman III implored Lý Thánh Tông to release him in exchange for three areas, known as Địa Lý, Ma Linh, and Bố Chính. These now form part of Quảng Bình Province and Quảng Trị Province.