IN VIETNAM
Project DELTA was the first of the four Special reconnaissance (SR) units with a Greek letter formed by the U.S. Military Assistance Command, Vietnam (MACV) during the Vietnam War to collect operational intelligence in remote areas of South Vietnam.
Project DELTA was established at Nha Trang in 1964 and consisted of six reconnaissance hunter-killer teams each composed of two United States Special Forces (USSF) and four Army of the Republic of Vietnam Special Forces (LLDB) and later supported by the 91st Ranger battalion. It was It was designated Detachment B-52, 5th Special Forces Group. DELTA’s missions included operational and strategic reconnaissance into long-held Viet Cong areas and the direction of air strikes on them. They were also to conduct bomb damage assessment, conduct small scale reconnaissance and hunter-killer operations, capture and interrogate VC/NVA, tap communications, bug compounds and offices, rescue downed aircrew and prisoners of war, emplace point minefields and other booby traps, conduct psychological operations, and perform counter intelligence operations. They were to focus on base areas and infiltration routes in the border areas.