American intervention 1965 1966 1967 Tet Offensive and aftermath Vietnamization 1969–1971 1972 Post-Paris Peace Accords (1973–1974) Spring 1975 Air operations Naval operations Lists of allied operations The Battle of Đức Cơ or the Battle of Landing Zone 27V was an engagement between the People's Army of Vietnam (PAVN) 5th Battalion of the 88th Regiment alongside the 69th Armor Regiment and 3rd Brigade, 25th Infantry Division with a company of the Republic of Korea Army 3rd Battalion, 1st Armored Regiment, supported by a tank platoon of the 1st Battalion, 69th Armor during the night of August 9–10, 1966.

Its commander sent out three listening posts 200 meters beyond the perimeter before sunset and followed standard Korean procedures by placing half of the men inside the main position on alert.

The southwest listening post reported sounds of digging about an hour before midnight, followed by the tripping of a flare on the western side of the perimeter.

Two more assaults were launched against the north and south sides of the perimeter during the next two hours, with several PAVN personnel coming within five meters of the position and one penetrating it before being bayoneted.

Subsequent speculation by American intelligence analysts stated that the PAVN attack might have been a diversionary move to draw attention away from their units escaping from Paul Revere II through the Ia Drang Valley and Chu Pong area.