The Hotchkiss gun can refer to different products of the Hotchkiss arms company starting in the late 19th century. It usually refers to the 1.65-inch (42 mm) light mountain gun; there were also a navy (47 mm) and a 3-inch (76 mm) Hotchkiss guns. The 42 mm gun was intended to be mounted on a light carriage or packed on two mules to accompany a troop of cavalry or an army travelling in rough country. Descriptions 1.65-inch gun The gun and accessories could be packed on two mules. The gun was introduced as a modern replacement for the aging twelve-pounder mountain howitzer. The first gun purchased by the U.S. military from the French arms firm of Hotchkiss was employed against the Nez Percé in 1877. Over the next twenty years the U.S. purchased 56. They were used at the Wounded Knee Massacre in 1890, and again in Cuba at the Battle of Las Guasimas, the Battle of El Caney and the attack on San Juan Hill during the Spanish–American War of 1898. Hotchkiss revolving cannon The Hotchkiss revolving cannon was a rotating barrel weapon invented in 1872 by Benjamin B. Hotchkiss (1826–1885), founder of Hotchkiss & Co. It was used by German authorities in the 19th century. It was also referred to as the "Hotchkiss gun". Though superficially resembling a Gatling gun, the internals are very different, with only a single reciprocating bolt rather than a separate action for every barrel. It was a built-up, rifled, rapid-fire gun of oil-tempered steel, having a rectangular breechblock which moved in a mortise cut completely through the jacket. It was designed to be light enough to travel with cavalry, and had an effective range beyond that of rifled small-arms. The 1-pounder revolving Hotchkiss cannon had five 37 mm barrels, and was capable of firing 68 rounds per minute with an accuracy range of . Each feed magazine held ten rounds and weighed approximately 18 pounds (8 kg). Besides the field gun version, there were several other versions of the 37 mm Hotchkiss revolving cannon, notably versions for naval defense against torpedo boats and fortress versions firing shrapnel or canister shells for the defense of moats. The naval version was adopted by Russia and the United States, amongst others. The field cannon version was accompanied by a horse-drawn ammunition limber, which held 110 rounds plus six loaded magazines, totaling 170 rounds. One example is