1. The first commercial flight from the United States to Cuba took place on March 15, 1929, when Pan American Airways flew from Key West to Havana.

2. The Gulf of Mexico oil spill, also known as the Deepwater Horizon oil spill, occurred on March 15, 2010. The spill, considered to be one of the worst environmental disasters in U.S. history, released approximately 4.9 million barrels of oil into the ocean.

3. On March 15, 1822, the territorial government of Florida was established, marking the beginning of Florida's journey towards attainment of statehood in 1845.

4. In 1973, on March 15th, Florida's Walt Disney World's Pirates of the Caribbean ride opened with a new addition that featured actor Johnny Depp as Captain Jack Sparrow, making it one of the park's most popular attractions.

5. On March 15, 1888, a cold wave and blizzard hit the state of Florida, dumping several inches of snow in some areas and causing widespread damage to crops and property. The event is remembered as the Great Blizzard of 1888.