1. On June 21, 1788, the United States Congress passed the Enabling Act, which authorized the creation of the Indiana Territory. The territory would later become the state of Indiana on December 11, 1816.

2. On June 21, 1946, the South Bend Blue Sox played the Rockford Peaches in the All-American Girls Professional Baseball League. The game ended in a 3-3 tie after ten innings, and each team received a half-game in the standings.

3. On June 21, 1964, the Indianapolis 500 was won by A.J. Foyt, who became the first driver to win the race four times. Foyt led 146 of the 200 laps and beat out second-place finisher Eddie Sachs by over a minute.

4. On June 21, 1977, the Indianapolis News reported that three tornadoes struck central Indiana over the weekend, causing extensive damage and killing two people. The tornadoes hit the town of Hope and the cities of Columbus and Greensburg.

5. On June 21, 1986, the Ku Klux Klan held a rally in downtown Indianapolis that drew thousands of protesters. The rally was a response to a recent court ruling that prohibited the Klan from marching through predominantly African American neighborhoods. Despite some clashes between protesters and police, the rally ended peacefully.