Air force

military branch of service primarily concerned with aerial warfare

An air force is the branch of a country's military which fights in the air. The air force is made up of aircraft such as fighters, bombers, helicopters and transport aircraft. When a navy has its own air force it is called Naval Aviation.

Air forces began in the early 20th century, usually as part of the army. Most countries separated their air forces in the 1930s and 1940s.

Aircraft in an air force sometimes fly in a formation. Formations are when the aircraft fly in a pattern. Air forces is part of the military.

The biggest air force in the world is the United States Air Force (USAF).[1] Second and third largest are the United States Navy and Russian Air Force.


  1. Daniel Slane (2010). Report to Congress of the United States: China Economic and Security Review Commission. DIANE Publishing. p. 74. ISBN 9781437943399.