 Originally, the unit consisted of propeller-driven aircraft, but the build-up in US forces saw the arrival of jet aircraft and, by the end of 1965, the US had deployed nearly 500 US combat aircraft in South Vietnam.By the time the unit was transformed into the Seventh Air Force on 1 April 1966, it consisted of nearly 1,000 aircraft and approximately 30,000 personnel.2nd Air Division aircrews received an important role in the vice president's South Florida Drug Task Force.