O-2B Skymaster Vietnam 1969

The Cessna O-2 Skymaster nicknamed "Oscar Deuce" is a military version of the Cessna 337 Super Skymaster, used for forward air control (FAC) and psychological operations (PSYOPS) by the US military between 1967 and 2010. The USAF took delivery of the O2 Skymaster in March 1967 and the O-2A also entered the U.S. Army's inventory during 1967, from USAF stock. By 1970, a total of 532 O-2s had been built, in two variants, for the USAF.

During the Vietnam War, the O-2A was introduced as a replacement for the O-1 Bird Dog, in the forward air control (FAC) aircraft. The O-2A continued night missions after the OV-10's introduction, due to the OV-10's high level of cockpit illumination, rendering night reconnaissance impractical.The O-2 was phased out completely after additional night upgrades to the OV-10.

A total of 178 USAF O-2 Skymasters were lost in the Vietnam War, to all causes.