Detachment 2 of the 6994th Security Squadron first became operational at Pleiku AB, which was located in the central highlands of the Republic of Vietnam.  Capt. Ernest Short was the first commander at Det 2 at Pleiku.  Personnel were assigned to detachment in 1 September 1966, but the it wasn't until 8 December 1966 before the first EC-47 (tail number 44-77254) was permanently assigned to Pleiku AB.  Eventually, 16 aircraft were based out of Pleiku.  The detachment operated out of Pleiku from 1 September 1966 to 1 June 1970, when it moved to DaNang AB, RVN.