1. In 1870, the city of Leavenworth in Kansas became the first city in the United States to officially celebrate "Pay Day."

2. On July 15, 1964, the Kansas City Athletics played in the longest single-game in MLB history, lasting 24 innings against the Cleveland Indians. The game ended in a 2-2 tie due to league curfew rules.

3. In 1981, the first ever gubernatorial recall election in the United States was held in Kansas. Voters ultimately chose to keep Governor John Carlin in office.

4. On July 15, 1861, the first regiment of Kansas volunteers was mustered into service for the Union Army during the American Civil War.

5. In 1827, Fort Leavenworth was established in Kansas, becoming the oldest active Army post west of the Mississippi River. The fort has played a significant role in military operations throughout American history, from the Indian Wars to World War II.