On March 11th in Louisiana history, several significant events took place:

1. In 1813, the Battle of Lake Borgne occurred during the War of 1812. American forces attempted to prevent a British invasion of New Orleans by intercepting their naval fleet on Lake Borgne, but were ultimately defeated.

2. In 1861, Louisiana became the sixth state to secede from the United States and join the Confederacy, sparking the beginning of the Civil War.

3. In 1931, Huey P. Long, one of Louisiana's most notorious political figures, was sworn in as the state's governor. Long would go on to serve as governor until his assassination in 1935.

4. In 1978, the Louisiana Superdome officially opened in New Orleans. The massive sports and entertainment venue, which has hosted multiple Super Bowls and countless other events, remains an icon of the city's skyline to this day.

5. In 2011, Louisiana was hit hard by the Deepwater Horizon oil spill, which began on March 11th when a BP oil rig exploded in the Gulf of Mexico. The environmental disaster caused extensive damage to Louisiana's coastline and fishing industry, and has had lasting effects on the region's ecology and economy.