Airpower

Airpower or air power comprises the application of military strategy and strategic theory to the realm of aerial warfare. Airpower began with the advent of powered flight early in the 20th century. Airpower represents a "complex operating environment that has been subjected to considerable debate". British doctrine defines airpower as "the ability to project power from the air and space to influence the behaviour of people or the course of events."

Airpower is a function of air supremacy and numbers. Roughly speaking, a combatant side that has 100% or near 100% control of the skies has air supremacy; an advantage of some 70–90% would indicate air superiority. A 50/50 split is air parity; lower than this, one side may be said to be air denied or air incapable. Because aeroplanes generally take off from designed airfields on missions typically involving some hours of cruising, the precise state of air superiority is fluid and less defined vis-a-vis land or sea warfare. For example, a contested airspace directly above a battlespace bristling with anti-aircraft weapons may be denied to the air forces of both sides. Further, the completely different situations of a technologically advanced airforce with one flight of high-tech planes (air supremacy but low capacity) or a low-tech force of massive numbers of low-tech planes (e.g., An-2) resulting in high capacity but low long-term survivability demonstrate that 'air power' is multi-faceted and complex.