1920 Event Royal Canadian Mounted Police forms as Royal Northwest Mounted Police merge with Dominion Police 1917 Event 257cm-mirror for Mount Wilson Observatory mounted 1912 Event U.S. Army tests 1st machine gun mounted on a plane 1904 Event Mounted police 1st used in New York City 1873 Event Canada's North West Mounted Police Force (RCMPF) forms 1873 Event Royal Canadian Mounted Police founded 1835 Event Texas Rangers, mounted police force authorized by Texas Prov Government 1684 Event Colony Massachusetts under authority of English crown mounted
