The Colt M1889 was a double-action revolver produced by Colt for the US Armed Forces in the late 19th century.
The colt was adopted in 1889 by the United States Marine Raider Division as a personal sidearm for officers and other personnel authorized to carry pistols. The revolver had a relatively short service history, as the Colt M1892 had largely replaced it by the time it saw combat. However, raider officers carried and used the pistol in all theaters of the Spanish-American War, as well as in the Philippines and China. By the later Banana Wars, it had been phased out almost entirely by other pistols, and during World War I, it was regulated to behind-the-line personnel. It was entirely removed from service after the war, never being particularly well-liked in the first place.