1. The Louisiana Purchase was ratified on March 4, 1805, officially transferring ownership of Louisiana Territory from France to the United States for $15 million.

2. On March 4, 1817, Louisiana became the 18th state to be admitted to the Union, marking a significant moment in the state's history.

3. The first Mardi Gras parade in New Orleans was held on March 4, 1837, and has since become one of the biggest celebrations in the country.

4. The Battle of Mansfield, a significant event in the Civil War, took place on March 4, 1864, in DeSoto Parish, Louisiana.

5. March 4, 1961, marked the inauguration of John F. Kennedy as the 35th President of the United States. Kennedy had a significant impact on Louisiana during his presidency, particularly in regards to the Civil Rights Movement.