On 14 October 1986, the Lanzhou Military Region of the Chinese People's Liberation Army (PLA) launched a raid operation called the Project Blue Sword-B (Chinese: 蓝剑-B计划) or the Operation Blue Sword-B (Chinese: 蓝剑-B行动) [2] [1] during the Sino-Vietnamese conflicts to capture several Vietnamese People's Army (VPA) strongholds near ...