1861 - Breech loaded guns in common use. 1861-1865 - American Civil War. Both breech and muzzle loaded guns used. 1862 - The Gatling Gun is invented. 1869 - Center-fire cartridge introduced.

The United States military has produced some incredible machine guns throughout history, but worldwide, the machine gun has ...

In November 1864, during the final weeks of the American Civil War, a Union train pulls ... the latest military invention of Dr. Gatling, the Gatling Gun. Only four such weapons have been ...