Why were World War I aerial battles fought at such close range?

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During World War I, aerial battles were fought at very close range primarily due to the limitations of the weaponry used by fighter aircraft. The machine guns mounted on these planes had an effective range of no more than approximately 200 yards.1

Because pilots lacked advanced targeting technology and relied solely on the naked eye for detection and aiming, they had to maneuver their aircraft into extremely close proximity to their targets to ensure a successful hit. The development of interrupter gear allowed machine guns to be mounted rigidly on the fuselage, enabling pilots to aim their weapons simply by pointing the entire airplane at the enemy. This configuration, combined with the use of simple ring-and-bead sights, necessitated short-range engagements to compensate for the lack of precision at greater distances.123

Tactically, pilots often attempted to gain an advantage through surprise, such as approaching from the rear or diving out of the sun, rather than relying on long-range marksmanship.1