The Cimarron Firearms USV Artillery Revolver. In the early 1890s the U.S. Army began issuing double-action revolvers in .38 Colt caliber, and was retiring the 1873 single actions. However, because of the underperformance of the somewhat anemic .38 Colt loading during the Spanish American War of 1898 and the Philippines Insurrection, many officers and men clamored for the return of the older, more powerful .45s. The older single-actions were in need of refurbishing, so they were returned to the factory and to Springfield Arsenal where the work was accomplished, including cutting the barrels from 7 1/2 inches to 5 1/2 inches. Because many were issued to artillery batteries, modern-day collectors have coined the term "Artillery Models" to these reissue arms. In 1898, the First Volunteer Cavalry, a colorful unit of cowboys and other adventurous young men was formed, with veteran Indian fighter Col. Leonard Wood in command and Lt. Col. Theodore Roosevelt second in command. Recruited in a...