1. In 1909, the first automatic telephone exchange in Indiana was established in Richmond. This system allowed subscribers to make phone calls without the assistance of an operator.

2. On April 6, 1970, the American Basketball Association's Indiana Pacers played their first home playoff game against the Miami Floridians. The Pacers went on to win the game 124-110 and eventually won the ABA championship that season.

3. Indiana native David Letterman made his debut as the host of Late Night with David Letterman on April 6, 1982. The show aired on NBC and became a cult classic, known for its quirky sketches and offbeat humor.

4. On April 6, 1862, the Battle of Shiloh began in Tennessee. Many soldiers from Indiana fought in this bloody Civil War battle, which resulted in over 23,000 casualties.

5. In 1941, the Kokomo, Indiana native and future movie star Steve McQueen was arrested for failing to register for the military draft. He was eventually released and went on to serve in the US Marines, laterusing his GI Bill benefits to enroll in acting school.