Deployed: 10 August 1965
Cover Designation: Detachment '4', 3d Radio Research Unit
Assigned Command: 53d US Army Security Agency Special Operations Command (3d RRU)
Supported Command: Field Force, Vietnam
Location: Nha Trang
Inactivated: 3 May 1966
Deployed: 28 July 1968
Cover Designation: 407th Radio Research Detachment
Assigned Command: US Army Security Agency Field Station, Phu Bai
Supported Command: 1st Brigade, 5th Infantry Division (Mech)
Location: Quang Tri
Inactivated: 1 April 1972 (zero strength on 28 August 1971)*
Vietnam Campaign Credit: 2-3, 8-17
Vietnam Honors: 3 MUCs and 3 RVN CGP
* Portion of mission transferred to Detachment 'A', USASA Field Station, Phu Bai.