By 1906, the United States evaluated several domestic and foreign-made semi-automatic pistols, including the Colt M1900, Steyr Mannlicher M1894, and an entry from Mauser. Although Springfield Armory had previously purchased 7.65×21mm Parabellum pistols for two separate field trials in 1900 and 1902, U.S. authorities had rejected the 7.65x21mm cartridge as insufficiently powerful for military use. In 1904, a small number of Parabellum pistols were tested in the then-new, more powerful 9×19mm round, but U.S. authorities again rejected the pistol. By this time, numerous adverse combat reports of insufficient stopping power of the Army's Colt .38 caliber revolvers used in the 1899-1902 Philippine Insurrection and the published findings of U.S. Army personnel obtained from the Thompson–LaGarde Tests resulted in a requirement for a military handgun in .45 (11.25mm) caliber.