[2] DELTA's mission included operational and strategic reconnaissance into long-held Viet Cong areas and the direction of air strikes on them.
[3] DELTA originated as LEAPING LENA which was established on 15 May 1964 in order for the USSF to train LLDB teams for missions in Laos.
[3] By October 1964 LEAPING LENA was re-designated Project DELTA with USSF in control and serving alongside LLDB in actual operations.
[9] Radio relay was initially handled by Vietnamese Air Force C-47 but was switched, due to inadequate loiter time, to the L19/O-1 Bird Dog.
Delta also used the U-6 Beaver and/or U-1 Otter of whichever Army Aviation unit was responsible for the Corps area the mission would be conducted in.
Nighttime radio relay was provided by the US Air Force's Airborne Battlefield Command and Control Center (ABCCC), a C-130 using the callsign "Moonbeam".