The counterinsurgency and unconventional warfare environment in Southeast Asia has resulted in the employment of USAF airpower to meet a mltitude of requirements. The varied applications of airpower have involved the full spectrum of USAF aerospace vehicles, support equipment, and manpower. As a result, there has been an accumulation of operational data and experiences that, as a priority, must be collected, documented, and analyzed as to current and future impact upon USAF policies, concepts, and doctrine. Project CHECO, an acronym for Contemporary Historical Examination of Current Operations, was establ ished to meet this Air Staff requirement. Managed by Hq PACAF, with elements at Hq 7AF and 7AF/13AF, Project CHECO provides a scholarly, "on-going" historical examination, documentation, and reporting on USAF policies, concepts, and doctrine in PACOM. This CHECO report is part of the overall documentation and examination which is being accomplished. Along with the other CHECO publications, this is an authentic source for an assessment of the effectiveness of USAF airpower in PACOM. This CHECO report examines non-organic aviation assets dedicated to provide various types of support at the Corps Tactical Zone (CTZ) level. The II, III, and IV CTZs each had one aviation group in a general support role. This study profiles the 12th Aviation Group in III CTZ, which supported II Field Force Vietnam, explaining how its aircraft were allocated and used by ground units.

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