1. The Indiana State Fair typically begins on September 1. The State Fair is one of the largest and oldest state fairs in the United States, dating back to its first fair in October 1852.

2. On September 1, 1910, the first section of the Indianapolis Motor Speedway was paved with 3.2 million bricks, giving the track its nickname "The Brickyard." The Brickyard is still used for motorsports events today, including the Indianapolis 500.

3. On September 1, 1805, a group of Native Americans attacked the town of Vincennes, Indiana. The attack was part of Tecumseh's War, a conflict between Native American tribes and the United States in the early 19th century.

4. On September 1, 1900, the first steel was poured at the new Gary Works steel mill in Gary, Indiana. The mill was one of the largest in the United States and played a significant role in the growth of the steel industry in the Midwest.

5. On September 1, 1939, World War II began with the invasion of Poland by Germany. While Indiana was not directly involved in the war at this time, many Hoosiers would go on to serve in the armed forces and support the war effort in various ways.