The .38 Long Colt remained the Army's primary revolver cartridge until 1909, when the .45 M1909 cartridge was issued along with the .45 Colt New Service revolver as the new standard military sidearm for the U.S. Army. However, some of the old .38 Long Colt revolvers and ammunition remained in reserve stocks, and when the U.S. entered World War I in 1917, the need for sidearms was such that even these low-performing weapons were brought out of storage for usage away from the front lines.