1. In 1840, the Great Nemaha Half-Breed Reservation was established, covering land in what is now northeast Kansas and southeastern Nebraska. The reservation was originally intended for individuals of mixed Native American and European ancestry, but it was later opened up to settlers in the early 1860s.

2. On June 20, 1867, the first official Wild West show was staged in North Platte, Nebraska, by William F. Cody (better known as Buffalo Bill). Cody's Wild West show featured reenactments of cowboy and Native American life, as well as performances by sharpshooters and horse trainers. The show traveled all over the United States and Europe throughout the late 19th and early 20th centuries.

3. In 1925, the first Kansas Relays track meet was held at the University of Kansas in Lawrence. The event has since become one of the most prestigious track and field competitions in the country, attracting top athletes from around the world.

4. On June 20, 1936, the city of Wichita was hit by a devastating tornado that killed 17 people and caused massive destruction throughout the city. The twister was one of the deadliest tornadoes in Kansas history, and it led to the development of new safety measures for communities in tornado-prone areas.

5. In 1951, Sunflower Army Ammunition Plant was established near De Soto, Kansas. The plant was one of the largest of its kind in the United States, producing military munitions during the Korean War and the Vietnam War. The plant was eventually sold to private developers in the 1990s and has since been partially dismantled.