The official USAF Aggressor program was born in 1972 as a response to the poor aerial combat performance of U.S. Air Force aircrews in Vietnam.
The Aggressors' charter remains to this day to improve combat performance through realistic, challenging training and education.
They accomplish this as the USAF's professional adversaries, flying F-15 and F-16 aircraft for Red Flag and Maple Flag exercises, USAF Weapons School syllabus support, priority test mission support and road shows that visit various units throughout the CAF.
[1] Established in July 2005, the 57th ATG (tail code: WA) consisted of Aggressor squadrons that replicate adversary threat tactics while training combat air forces aircrews.
This article incorporates public domain material from the Air Force Historical Research Agency