Operation Farm Gate was the deployment of the 1st Air Commando of the United States Air Force 
to South Vietnam.  In many ways a covert operation, planes operating under Farm Gate flew under 
South Vietnam colors although they still took their orders from the United States Air Force.  
For this reason these aircraft and the appropriate formation is included in the South Vietnamese 
OOB rather than either US OOB.
*
The seperate AOP formation is specifically designed for observation/recon aircraft deployed as
part of the Farm Gate Force.  Because of class all the AOP aircraft are available in this
formation, but only the RT-28 and RB-26s should be purchased.  All others should only be
purchased in the generic spotter plane formation.