1. The Indiana State Fairgrounds Coliseum opened its doors on September 26, 1939, becoming a popular venue for sporting events and concerts.

2. On September 26, 1951, the first episode of "The Adventures of Ozzie and Harriet" was broadcast on television. The show, starring Ozzie and Harriet Nelson and their two sons, became a long-running family sitcom.

3. Indiana native and renowned composer Cole Porter was born on September 26, 1891, in Peru. He is best known for his numerous hit songs and Broadway musicals, including "Anything Goes" and "Kiss Me, Kate."

4. In 1783, a treaty was signed between the United States and the Native American tribes of the Ohio Valley region on September 26, known as the Treaty of Fort Stanwix. This treaty helped to establish peaceful relations between the two groups.

5. President Harry S. Truman made a campaign stop in Indianapolis on September 26, 1948, during his re-election bid. He gave a speech at Monument Circle, attracting a large crowd of supporters.