Farm Gate was the codename for an American air force mission in Vietnam.

In the early 1960s, the US armed forces were developing units specifically designed to counter guerrilla warfare

Guerrilla warfare

Guerrilla warfare is a form of irregular warfare and refers to conflicts in which a small group of combatants including, but not limited to, armed civilians use military tactics, such as ambushes, sabotage, raids, the element of surprise, and extraordinary mobility to harass a larger and...

. The first unit in the USAF of this nature was the 4400th Combat Crew Training Squadron code named "Jungle Jim" that were later renamed the 1st Air Commando Group

1st Air Commando Group

The 1st Air Commando Group is an inactive United States Air Force unit. It was last assigned to the Army Service Forces, based at Camp Kilmer, New Jersey. It was inactivated on 3 November 1945....

 after the same unit who served in the China Burma India Theatre of World War II.