1. On May 27, 1813, the Battle of Lake Borgne took place during the War of 1812. The British attacked an American flotilla, causing heavy casualties and capturing several ships.

2. Louisiana became the 18th state in the United States on May 27, 1812, just one year before the Battle of Lake Borgne.

3. On May 27, 1861, two regiments of Louisiana volunteers marched into New Orleans, signaling the state's secession from the Union and its support for the Confederacy in the Civil War.

4. Jazz musician and bandleader Jimmie Lunceford was born on May 27, 1902, in Fulton, Mississippi. He later became a prominent figure in the jazz scene in New Orleans during the 1920s and 1930s.

5. On May 27, 1942, the United States Army Air Forces activated the 8th Air Force, which included several bomber groups that would later be based in Louisiana during World War II.