1. In 1837, the Indiana State Bank suspended specie payments, causing widespread financial panic and economic depression in the state.

2. On June 20, 1863, during the Civil War, Union forces under General Ambrose Burnside captured the town of Vicksburg, Mississippi, after a lengthy siege that lasted more than six weeks. This victory gave the Union control of the Mississippi River, splitting the Confederacy in two and marking a major turning point in the war.

3. In 1871, the first shipment of natural gas was sent from Indiana to Chicago, marking the beginning of a new era in energy production and consumption in the region.

4. On June 20, 1942, the U.S. Army opened its first parachute training school at Fort Benning, Georgia, paving the way for the development of elite airborne units like the 82nd and 101st Airborne Divisions.

5. In 1960, Indiana Senator Birch Bayh introduced a proposed constitutional amendment that would later become the 25th Amendment to the U.S. Constitution, which outlines the procedures for presidential succession and disability. The amendment was ratified by Congress and the states in 1967, and has been invoked several times in U.S. history to address presidential vacancies and temporary incapacitation.