"they had U S Government 45 automatic pistols"
M1911 A1 pistol
Creative Commons Attribution Share AlikeM1911 A1 pistol - Credit: M62

Chambered with a .45 ACP cartridge, the M1911 handgun was formally adopted by the U.S. Army on March 29, 1911 (hence, its name).

It was the standard-issue firearm for the U.S. armed forces until 1985.