1. In 1921, the first radio broadcast from Indiana University was aired on October 20th. It was a speech given by IU President William Lowe Bryan and transmitted from the university's electrical laboratory.

2. On October 20, 1865, the first train arrived in Lafayette, Indiana, on the newly constructed Lafayette and Indianapolis Railroad. The completion of the railroad helped boost economic growth and transportation in the region.

3. Famous American novelist Kurt Vonnegut was born in Indianapolis, Indiana, on October 20, 1922. He is known for his satirical and darkly comedic writing style, as well as his activism and outspoken political views.

4. The Indiana State Fairgrounds Coliseum was dedicated on October 20, 1939. The iconic venue has hosted many significant events, including concerts, sporting events, and political rallies.

5. In 2014, Indiana was hit by a severe windstorm on October 20th, causing widespread power outages and damaging property throughout the state. The storm, which included winds of up to 84 miles per hour, was one of the most significant weather events in Indiana in recent years.