1215 King John assents to the Magna Carta, one of the primary documents of the English legal system, and by extension, the legal system of the United States.
1863 USS Wyoming victorious at Shimonoseki Straits in an action against a Japanese local power (warlord).
1866 The site for Ft. Phil Kearney chosen.
1872 Cornerstone laid for the Territorial Prison in Laramie.
1992 ML Ranch in Big Horn County added to the National Register of Historic Places.
1894 Butch Cassidy and Al Hainer sent to the Wyoming State Penitentiary for extortion. They'd been running a protection racket aimed at ranchers.
1920 Casper made the headquarters for a division of the Chicago & Northwestern Railroad. Attribution: Wyoming State Historical Society.