1) On August 19, 1812, Louisiana became the 18th state in the United States. This event marked an important milestone in the history of the state and the nation, as Louisiana was the first state to be formed from land acquired through the Louisiana Purchase in 1803.

2) On August 19, 1846, the U.S. Navy established the Naval Station at Algiers, Louisiana. This base served as an important hub for military operations during the Civil War, and later became a major port for shipping and trade in the Gulf Coast region.

3) On August 19, 1919, the first commercial flight in Louisiana took place. The flight, which was operated by the Louisiana Airways Corporation, flew from New Orleans to Baton Rouge and back again, marking a significant milestone in the development of air travel in the state.

4) On August 19, 1955, a major hurricane struck Louisiana, causing widespread damage and flooding throughout the region. The storm, which came to be known as Hurricane Diane, was one of the most destructive hurricanes to hit the United States in the 1950s, and served as a sobering reminder of the dangers posed by severe weather in the Gulf Coast region.

5) On August 19, 2005, Hurricane Katrina made landfall in Louisiana, causing catastrophic damage and flooding throughout the state and the entire Gulf Coast region. The storm, one of the deadliest and costliest in U.S. history, resulted in the displacement of more than one million people and had a profound impact on the region that is still felt today.