The M1919 Browning is an American .30 caliber medium machine gun that was widely used during the 20th century, especially during World War II, the Korean War, and the Vietnam War. The M1919 saw service in a wide variety of roles, as a light infantry, coaxial, mounted, aircraft, and anti-aircraft machine gun at various points. The emergence of general-purpose machine guns in the 1950's pushed the M1919 into secondary roles in many cases, especially after the arrival of the M60 in US Army service.