Such units act as a force multiplier allowing the secure operation of forward airbases and thereby increasing the availability and responsiveness of aviation assets.
The chief missions in such units are combat search and rescue, including rescuing downed aircrews in hostile territory; long-range reconnaissance, direct action and forward air control in support of air to ground operations, for example illuminating targets for attack by laser-guided bombs.
Other common roles include military weather forecasting, pathfinding, domestic counter terrorism and hostage rescue missions; capturing airbases, establishing advanced airfields and conducting air traffic control.
In the event of the perimeter being penetrated, heavily armed and mobile fast response units, often using armored vehicles, will attempt to intercept, identify and if necessary suppress the incursion.
Wartime doctrine, in for example the RAF Regiment and USAF Security Forces, sees the addition of another layer through the use of aggressive patrolling outside the perimeter to deter, detect and destroy would be attackers.
Later in the war with Germany facing a manpower shortage, rather than release its personnel to the German Army, Göring chose instead to create the Luftwaffe Field Divisions, using personnel surplus to the needs of flying operations; as cadre for these units, officers and non commissioned officers were transferred from the Flak and paratroop units.
To guard against British airfields falling to German paratroops as Maleme had, Winston Churchill demanded that RAF airmen should be trained and equipped to defend themselves against ground attack.
[4] Amongst the measures implemented were improvised armoured cars, such as the Armadillo or Bison, and pillboxes, most notably the Pickett-Hamilton fort, which could be raised to block a runway.
Post war the newly established United States Air Force (USAF) saw its primary role as a strategic one.
In a demarcation of combat roles the United States Army was primarily responsible for security outside of airbases, and the Republic of Vietnam Air Force for patrolling the internal perimeter.
Rifle squads responded, mounted in heavily armed Cadillac Gage Commando and M113 armored personnel carriers.