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Maxim machine gun, first fully automatic machine gun (q.v.), developed by engineer and inventor Hiram Maxim in about 1884, while he was residing in England. It was manufactured by Vickers and was sometimes known as the Vickers-Maxim and sometimes just Vickers. These guns were used by every major power. The Maxim gun was recoil-operated and was cooled by a water jacket surrounding the barrel. The Maxim was in large part responsible for the epithet “the...