Battle of Lạng Sơn

Battle of Lạng Sơn may refer to:
 * The Lạng Sơn Campaign in 1885, a French offensive during the Sino-French War.
 * The Battle of Lạng Sơn in September 1940, fought by French forces against the Imperial Japanese Army during the Japanese invasion of French Indochina.
 * The Battle of Lạng Sơn (1979) during the Sino-Vietnamese War.