NKP initially housed USAF search and rescue forces and maintained a communications capability in support of U.S. Air Force objectives in Southeast Asia. NKP was the location of TACAN station "Channel 89" and was referenced by that identifier in voice communications during air missions. The 634th Combat Support Group was inactivated and the 56th Air Commando Wing was formed on 8 April 1967. The 606th Air Commando Squadron formed the operational backbone of the new wing, and the 56th Combat Support Group took over the major support functions. The 56th Air Commando Wing designation was changed to 56th Special Operations Wing on 1 August 1968.