1. In 1878, infamous outlaw Sam Bass and his gang robbed the Union Pacific Railroad train near Wilcox, Wyoming. The robbery netted the gang around $60,000 in cash and gold, and Bass became one of the most wanted men in the west.
2. The Wyoming State Capitol building in Cheyenne was dedicated on July 13, 1890, the same year Wyoming was admitted to the Union as the 44th state.
3. On July 13, 1935, the town of Basin, Wyoming was hit by a deadly tornado that killed 9 people and caused extensive damage to buildings and infrastructure in the area.
4. In 1956, the University of Wyoming's American Heritage Center was founded in Laramie, Wyoming. The center houses over 90,000 cubic feet of manuscripts, photographs, artifacts, and other materials related to American history and culture.
5. On July 13, 1990, the first Cheyenne Frontier Days rodeo performances took place at the Frontier Park Arena. A tradition since 1897, Cheyenne Frontier Days is the world's largest outdoor rodeo and western celebration.