1. The Louisiana Purchase Treaty was signed on September 25, 1803, officially transferring ownership of the Louisiana Territory from France to the United States. This purchase doubled the size of the young nation and paved the way for westward expansion.

2. On September 25, 1953, Governor Robert Kennon signed into law a bill allowing Black citizens of Louisiana to serve on grand juries. This was a significant step forward for civil rights in the state.

3. The Battle of Baton Rouge took place on September 25, 1862, during the Civil War. Confederate forces launched a surprise attack on the Union garrison in the city, but were ultimately repelled after a two-day battle.

4. Jazz legend Louis Armstrong was born in New Orleans on September 25, 1901. Armstrong is widely considered one of the most influential musicians in jazz history, and his music continues to be celebrated around the world.

5. Hurricane Rita made landfall in Louisiana on September 25, 2005, just a few weeks after Hurricane Katrina devastated the Gulf Coast. While Rita was not as catastrophic as Katrina, it still caused widespread damage and resulted in dozens of fatalities.