1810 Father Miguel Hidalgo y Costillo and several hundred of his parishioners seized the prison at Dolores, Mexico marking the beginning of the first significant Mexican rebellion against Spain.
1811 The Astorians renamed Seeds-Kee-Dee-Agie (Praire Hen River) the Spanish River. It would later be renamed the Green River.
1875 J. C. Penney Jr, founder of J. C. Penny's, which first opened its doors in Kemmerer, born in Hamilton Missouri.
1924 A coal mine explosion at Kemmerer kills 55.
1940 President Franklin D. Roosevelt signed into law the Selective Training and Service Act, which set up the first peacetime military draft in U.S. history.
1940 President Franklin Roosevelt orders the Army to begin mobilizing the entire National Guard for one year’s training. The National Guard's horsed cavalry regiments, would go into Federal service for the last time. Horse mechanized units, such as Wyoming's 115th Cavalry Regiment (Horse-Mechanized) would go into service for the first and last time.
1947 BB-32, the USS Wyoming, stricken from the Navy rolls.
1950 War Memorial Stadium opened. Attribution: On This Day.
1988 Casper native Tom Browning, Cincinnati Reds pitcher, pitched a perfect game against the Los Angeles Dodgers. Attribution: Wyoming State Historical Society.