The battle of Dak To in Vietnam was a series of major engagements of the Vietnam War that took place between 3 and 23 November 1967, in Kon Tum Province, in the Central Highlands of the Republic of Vietnam. The action at Đắk Tô was one of a series of People's Army of Vietnam offensive initiatives that began during the second half of the year. PAVN attacks at Lộc Ninh, Song Be and at Con Thien and Khe Sanh, 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 42nd Infantry Regiment, 22nd Division and Airborne units. The fighting was intense and lasted into late 1967, when the PAVN seemingly withdrew.