The unit served in Vietnam from 23 December 1965 from Ft. Bragg and departed Vietnam on 19 April 1971 to return to Ft. Bragg, as 1st Military Intelligence Battalion (Air Reconnaissance Support)(MIBARS). Detachments were stationed in multiple locations during the battalion's deployment. Each detachment consisted of an operations/imagery interpretation section, a reproduction section and a supply and maintenance section. • Headquarters and Headquarters Company was based in Saigon at Muscara Compound. It included an aviation platoon ("The Good Guys"). • Detachment A was based at
Biên Hòa and supported III Corps operations. • Detachment B was based at
Da Nang and supported I Corps operations. • Detachment C was based at
Cần Thơ and supported IV Corps operations. • Detachment D was based at
Nha Trang and supported II Corps operations. • 45th Military Intelligence Detachment was assigned to 1st MI Battalion in 1968 and was based in Phu Bai. It was eventually organized as Detachment E and supported operations in I Corps. ==Decorations==