On 25 May , 2,500 Việt Minh troops overwhelmed Destroying the French fortress at Dong Khé , which lay Placing at the strategic center of RC4 , thus cutting Change the supply Supply line between the French positions at Cao Bằng and Lạng Sơn .

The 1st BEP waited Temporary_stay at That Khe while a force of French colonial troops , the Moroccan 1st and 11th Tabors , assembled Come_together at Lạng Sơn .

The Mỹ Lai Massacre ( ; ) was the Vietnam War mass murder Killing of unarmed South Vietnamese civilians by U.S. troops in Sơn Tịnh District , South Vietnam , on 16 March 1968 .

This war crime , which was later called Name_conferral `` the most shocking Body_movement episode of the Vietnam War '' , took place Process_start in two hamlets of Sơn Mỹ village in Quảng Ngãi Province .

Currently , the event is referred Adducing to as the `` My Lai Massacre '' in the United States and called Name_conferral the `` Sơn Mỹ Massacre '' in Vietnam .