1. On July 13, 1863, the largest Civil War battle fought on Indiana soil took place in Corydon. The battle saw Confederate soldiers under the command of General John Hunt Morgan raiding the town, leading to a fierce battle that resulted in more than 130 casualties.

2. July 13, 1930, saw the founding of the Indiana State Police, which has since then been responsible for protecting and serving the state of Indiana. The agency was created in response to increasing crime rates in the state and today has nearly a thousand officers working throughout Indiana.

3. On July 13, 1985, the Indianapolis Live Aid concert was held at the old Market Square Arena in Indianapolis. The event was organized to raise money for Ethiopian famine relief and featured performances by some of the biggest names in music at the time, including Madonna, Elton John, and the Beach Boys.

4. The first official women's basketball game in Indiana High School Athletic Association history was played on July 13, 1975. The game featured the girls' teams from Ben Davis and Carmel High Schools and marked a significant moment in the history of women's sports in Indiana.

5. July 13 is also significant in Indiana aviation history. On this day in 1918, Lt. Alford J. Williams of the U.S. Army Air Service flew his Curtiss JN-4 "Jenny" biplane over Indianapolis, becoming the first person to fly a plane over the Indiana state capital. This marked a milestone in early aviation history and helped pave the way for the development of the aviation industry in Indiana.