1. On March 9, 1731, Jean Baptiste le Moyne de Bienville founded the city of New Orleans, one of the most iconic and culturally rich cities in the United States.

2. The Louisiana Purchase, which doubled the size of the United States at the time, was signed on March 9, 1803. The $15 million deal was negotiated between the United States and France, marking a significant moment in American history.

3. In 1864, Union soldiers under the command of General Nathaniel Banks occupied Alexandria, Louisiana during the Civil War. The city was strategically important due to its location on the Red River and was the site of several battles during the conflict.

4. On March 9, 1877, Louisiana governor Francis T. Nicholls was inaugurated. Nicholls had previously served as a Confederate general during the Civil War and was a strong advocate for the rights of Black citizens in Louisiana.

5. The first Mardi Gras parade in New Orleans took place on March 9, 1837. The event has since become a beloved tradition, with millions of people flocking to the city each year to celebrate the colorful and festive holiday.