1st Searchlight Battery was a United States Marine Corps unit formed during the Vietnam War to monitor the "Electronic Wall of Defense" that was set up along the Vietnamese Demilitarized Zone.
The Battery began at Marine Corps Base Twentynine Palms, California.
It was the first unit in the history of the Marine Corps with infrared/xeon arc technology searchlights.
Deployed to South Vietnam on the USS Paul Revere, departing the continental limits of the United States from National City, California, on May 31, 1967.
On July 3 the Battery began deployment of the 3 platoons to seven areas of the Quảng Trị Province/I Corps: Con Thien, Cửa Việt, Khe Sanh, Gio Linh, Đông Hà, Cam Lộ, Camp Carroll and Thừa Thiên Provinces: (Phu Bai and Camp Evans).