by Sr Vice Commander Carl Kurfess
The M1911 is a single-action, semiautomatic, magazine-fed, recoiloperated pistol chambered for the .45 ACP cartridge. It served as the standardissue sidearm for the United States Armed Forces from 1911 to 1986. It was first used in later stages of the Philippine–American War, and was widely used in World War I, World War II, the Korean War, and the Vietnam War. The U.S. procured around 2.7 million M1911 and M1911A1 pistols in military contracts during its service life. The M1911 was replaced by the 9mm Beretta M9 pistol as the standard U.S. sidearm in October 1986, but due to its popularity among users, it has not been completely phased out. Modernized derivative variants of the M1911 are still in use by some units of the U.S. Army Special Forces, the U.S. Navy and U.S. Marine Corps.
American units fighting Moro guerrillas during the Philippine–American War using the then-standard Colt M1892 revolver, .38 Long Colt, found it to be unsuitable for the rigors of jungle warfare, particularly in terms of stopping power, as the Moros had high battle morale and often used drugs to inhibit the sensation of pain. The U.S. Army briefly reverted to using the M1873 single-action revolver in .45 Colt caliber, which had been standard during the late 19th century; the heavier bullet was found to be more effective against charging tribesmen. The problems prompted further testing for a new service pistol and following trials conducted from 1904 to 1911 Colt pistol was formally adopted by the Army on March 29, 1911, when it was designated Model of 1911, later changed to Model 1911, in 1917, and then M1911, in the mid-1920s. Battlefield experience in WW I led to some more small external changes, completed in 1924. (Thanks for this trip down memory lane Carl. The M1911 happens to be your editor’s favorite side arm.) https://en.wikipedia.org/wiki/M1911_pistol