Marines launch Operation Prairie - Aug 03, 1966 - HISTORY.com

U.S. Marine units commence Operation Prairie, a sequel to an earlier operation in the area (Operation Hastings), which involves a sweep just south of the Demilitarized Zone (DMZ) against three battalions of the North Vietnamese 324B Division. An additional 1,500 Marines from Seventh Fleet ships off Quang Tri Province conducted amphibious landings on September 15 to assist in the operation, which lasted until September 19 and resulted in a reported 1,397 communist casualties.