Carried out between 21 and 26 June 1969, the assault interdicted Route 110 of the Sihanouk Trail for its planned three-day stoppage of military supplies.

Located in the southern panhandle of the territory of the Kingdom of Laos, the Ho Chi Minh Trail was the logistics backbone of the communist forces during the Second Indochina War, as it was the main supply route for Viet Cong and People's Army of Vietnam (PAVN) forces fighting in South Vietnam.

One of them was selected to undertake MR 4's first battalion-sized operation; they were tasked to temporarily cut Route 110 and clog the logistic network of the Sihanouk Trail leading into Cambodia.

[6][7] After cutting the communist supply lines between Cambodia, Laos and South Vietnam for three days, 2 SGU withdrew in the face of gathering PAVN forces.

Their interdiction having diverted communist offensive pressure from the Royalist garrison at Attopeu, 2 SGU now evaded the PAVN and regrouped there on 26 June 1969.