1. Osage Hills Wildfire
On December 15, 2016, a wildfire swept through Osage County in Oklahoma, destroying over 400,000 acres of land, killing two people, and injuring many others.

2. Oklahoma statehood
On December 15, 1906, Oklahoma became a state, after being a territory for over 40 years. This day is commemorated every year as Oklahoma Statehood Day.

3. The Department of Energy
On December 15, 1977, President Jimmy Carter signed legislation creating the Department of Energy, which was responsible for the nation's energy policy and research. Later, the Sandia National Laboratories, a research institution focused on nuclear weapons, was established in Oklahoma.

4. The Will Rogers World Airport
On December 15, 1948, the Will Rogers World Airport in Oklahoma City was dedicated in honor of the famous Oklahoman humorist, Will Rogers. The airport has since grown to become one of the busiest airports in the state.

5. The Oklahoma City Thunder
On December 15, 2008, the Seattle Supersonics were renamed the Oklahoma City Thunder after moving to Oklahoma City. The team has since become a beloved part of Oklahoma City's sports community, and its players have gone on to achieve great success on and off the court.