Since the first successful flight of an airplane, people had imagined and dreamed of airplanes being used for combat. H. G. Wells's 1908 book (The War in the Air was an example. When World War One broke out, there were only about 1000 planes on all sides. Planes were very basic. Cockpits were open, instruments were rudimentary, and there were no navigational aids. Pilots had to use maps, which were not always reliable. Getting lost was common. Sometimes pilots had to land and ask directions! At the beginning of the war, airplanes were seen as being almost exclusively for reconnaissance, taking the job formerly done by cavalry. Eventually, however, it became necessary for planes to eliminate the observation planes of the enemy, so air-to-air combat (dogfights) became common.

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