WWII: annual production of machine guns 1939-1945, by country
Light machine guns (LMGs), used by just one infantryman, grew more popular as the war progressed, although they were more difficult to produce - most of the machine guns used in the war were categorized as medium machine guns, and required multiple personnel to operate. Additionally, heavy machine guns were more static and used in fixed, defensive positions, and required a crew to operate. Machine guns were not only used on the ground, but were also mounted to tanks and armored vehicles, as well as aircraft and ships.