Machine guns are fully automatic firearms that continue to fire bullets as long as the trigger is depressed and ammunition is available. The World’s first fully automated machine guns were invented in the USA by Hiram Maxim in 1883 and patented two years later. Maxim’s machine gun was first used during the Second Boer War (1899-1902) in South Africa and the Russo-Japanese War (1904-1905). https://machineguns.us/