This compact reference guide, by respected expert John Walter, provides descriptions, technical specifications, and illustrations of the machine guns used in both world wars, some of which--such as the 0.50 Browning--are still in service today. Many were produced in huge numbers, though it is difficult to provide accurate totals. The United States is believed to have made 2.6 million guns between the attack on Pearl Harbor and the end of the campaigns in the Far East in August 1945; German output from 1939 to 1945 totaled 1.2 million; and Soviet claims suggest that more than 1.5 million machine guns of all types and calibers were made during the Great Patriotic War. By contrast, between 1939 and 1944, Britain produced less than a million machine guns, concentrating instead on submachine guns. Walter details and compares weapons produced in these countries and others, including Denmark, Austria-Hungary, Italy, Romania, Yugoslavia, Poland, and Turkey.