The action at Đắk Tô was one of a series of People's Army of Vietnam (PAVN) offensive initiatives that began during the second half of the year. PAVN attacks at Lộc Ninh (in Bình Long Province), Song Be (in Phước Long Province) and at Con Thien and Khe Sanh, (in Quảng Trị Province), were other actions which, combined with Đắk Tô, became known as "the border battles". The post hoc purported objective of the PAVN forces was to distract American and South Vietnamese forces away from cities towards the borders in preparation for the Tet Offensive.

During the summer of 1967, engagements with PAVN forces in the area prompted the launching of Operation Greeley, a combined search and destroy effort by elements of the U. S. 4th Infantry Division and 173rd Airborne Brigade, along with the Army of the Republic of Vietnam (ARVN) 42nd Infantry Regiment, 22nd Division and Airborne units. The fighting was intense and lasted into late 1967, when the PAVN seemingly withdrew.

By late October U.S. intelligence indicated that local communist units had been reinforced and combined into the PAVN 1st Division, which was to capture Đắk Tô and destroy a brigade-size U.S. unit. Information provided by a PAVN defector provided the allies a good indication of the locations of PAVN forces. This intelligence prompted the launching of Operation MacArthur and brought the units back to the area along with more reinforcements from the ARVN Airborne Division. The battles on the hill masses south and southeast of Đắk Tô became some of the hardest-fought and bloodiest battles of the Vietnam War.