"Known in the aviation community as “Red Flag”, it was established in 1975 as one of the initiatives directed by General Robert J. Dixon to maximize combat readiness, capability and survivability as they prepare for combat. The Red Flag maneuver has also been featured at the world-famous air show hosted by Nellis Air Force base. Participants will engage in a mission that military fighter pilots call Air Combat Maneuvering, whereby they will split off into Orange Air (friendly force) and Red Air (hostile force) and engage in a continuous aerial dogfight. Blue Air will be tasked to protect a high value target on the ground and Red Air will be tasked to destroy that target or die trying! The result is an action packed constant aerial battle whereby up to four fighters square off against each other to see who emerges as King Of The Skies."
https://www.skycombatace.com/operation-red-flag/