he Marine Corps launched multiple search-and-destroy missions on Aug. 6, 1966, in the Que Son Valley, a populous, rice-rich area that was one of the key locations in the fight for control of South Vietnam’s northernmost provinces. The valley, astride the boundary between Quang Nam and Quang Tin provinces, was the stomping ground of the North Vietnamese Army’s 2nd Division, a firstrate combat formation, also known as the 620th Division, tasked with maintaining control over this vital strategic area.
In the Que Son Valley campaign, officially Operation Colorado, Col. Charles F. Widdecke’s 5th Marine Regiment, 1st Marine Division, and South Vietnamese troops from the 2nd Division, Army of the Republic of Vietnam, set out to eliminate the NVA 2nd Division.
The 5th Marines’ 2nd Battalion, commanded by Lt. Col. Walter…