1) On April 4, 1968, civil rights leader Dr. Martin Luther King Jr. was assassinated in Memphis, Tennessee. The tragic event had a profound impact on communities across the nation, including in Indiana where King had previously visited and spoke at rallies.

2) In 1977, legendary Indiana University basketball coach Bob Knight led his team to a national championship victory against the University of North Carolina. The Hoosiers went undefeated that season and remain the most recent team to accomplish that feat.

3) April 4, 1865 marks the day when Union General Benjamin Harrison and his troops captured the city of Richmond, Virginia - the capital of the Confederate States of America. Harrison later became the 23rd President of the United States.

4) On April 4, 1939, the Indianapolis Motor Speedway held its first race of the year - the 100-mile "National Championship" race. Wilbur Shaw went on to win the race, the first of his three victories at the famed racetrack.

5) Indiana Governor Eric Holcomb declared April 4, 2017 as "Bison-tennial Day" in honor of the state's official mammal, the American bison. The day marked the 200th anniversary of the animal's reintroduction to Indiana after being hunted to near extinction.