Prior to the Summer Offensive of 1965 , Quang Ngai and the surrounding provinces had witnessed a substantial increase in VC military activities . On February 6 , 1965 , the VC 409th Sapper Battalion attacked the U.S. base at Camp Holloway at Pleiku , injuring more than a hundred American personnel and damaging about 20 aircraft . The U.S. retaliated by launching Operation Flaming Dart , bombing selected targets in North Vietnam . On 10 February the VC bombed a U.S. military billet in Qui Nhơn and the U.S. retaliated by launching Operation Flaming Dart II . Following those actions the VC decided to launch a major assault on South Vietnamese units in Ba Gia , a small village in Son Tinh District about 10 kilometres away from Quảng Ngãi City
bombed a U.S. military billet in Qui Nhơn
1965 Qui Nhơn hotel bombing
Battle of Ba Gia