The Sino–Vietnamese War ( Vietnamese : Chiến tranh biên giới Việt-Trung ), also known as the Third Indochina War , known in the PRC as Chinese : 对越自卫反击战; pinyin : duì yuè zìwèi fǎnjī zhàn ; literally "Defensive Counterattack against Vietnam" and in Vietnam as Chiến tranh chống bành trướng Trung