1766 Antonio de Ulloa, the first Spanish governor of Louisiana, arrives in New Orleans.
1807 Former U.S. Vice President Aaron Burr is acquitted of treason. He had been accused of plotting to annex parts of Louisiana and Mexico to become part of an independent republi
1811 Unsuccessful slave revolt led by Charles Deslandes in St. Charles and St. James, Louisiana.
1812 Louisiana is admitted as the 18th U.S. state.
1812 Following Louisiana's admittance as a U.S. state, the territory by that name was renamed to Missouri Territory.
1848 U.S. presidential election, 1848: Whig Zachary Taylor of Louisiana defeats Democrat Lewis Cass of Michigan in the first US presidential election held in every state on the same day.
1861 American Civil War: Louisiana secedes from the Union.
1865 American Civil War: Confederate General Richard Taylor, commanding all Confederate forces in Alabama, Mississippi, and eastern Louisiana, surrenders his forces to Union General E.R.S. Canby at Citronelle, Alabama.
1935 Senator Huey Long of Louisiana makes the longest speech on Senate record. The speech took 15
1935 Carl Weiss fatally shoots US Senator from Louisiana, Huey Long, nicknamed "Kingfish", in the Louisiana capitol building in Baton Rouge.
1935 Carl Weiss fatally shoots US Senator from Louisiana, Huey Long, nicknamed "Kingfish", in the Louisiana capitol building in Baton Rouge.
1940 U.S. Army 45th Infantry Division (previously a National Guard Division in Arizona, Colorado, New Mexico, and Oklahoma), activated and ordered into federal service for one year to engage in a training program in Ft. Sill and Louisiana prior to serving in World War II.
1960 December 12
1991 David Duke, a white supremacist running as a Republican, loses the Louisiana Governor's race to Democratic candidate Edwin Edwards, by an overwhelming margin.
1992 Yoshihiro Hattori, a 16-year-old Japanese exchange student, mistakes the address of a party and is shot after knocking on the wrong door in Baton Rouge,Louisiana. The shooter, Rodney Peairs, is later acquitted, sparking outrage in Japan.
2005 At least 1,836 are killed, and severe damage is caused along the U.S. Gulf Coast, as Hurricane Katrina strikes the Louisiana, Mississippi and Alabama coastal areas.
2005 St. Tammany Parish Schools reopen in Louisiana, just over a month after Hurricane Katrina closed them.