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In page Fighter aircraft:

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A fighter aircraft is primarily designed for air-to-air combat.[1] A given type may be designed for specific combat conditions, and in some cases for additional roles such as air-to-ground fighting. Historically the British Royal Flying Corps and Royal Air Force referred to them as "scouts" until the early 1920s, while the U.S. Army called them "pursuit" aircraft until the late 1940s (using the designation P, as in Curtiss P-40 Warhawk, Republic P-47 Thunderbolt and Bell P-63 Kingcobra). The UK changed to calling them fighters in the 1920s[citation needed], while the US Army did so in the 1940s.[2] A short-range fighter designed to defend against incoming enemy aircraft is known as an interceptor.