Mount Mẫu Sơn or officially Mẫu Sơn peak is a plateau in Lộc Bình District, Lạng Sơn Province, in the Northeastern Vietnam. It is located about 170 km northeast of Hanoi and about 30 km east of Lạng S

Cochinchina or Cochin-China is a historical exonym for part of Vietnam, depending on the contexts, usually for Southern Vietnam. Sometimes it referred to the whole of Vietnam, but it was commonly used