1. In 1889, Oklahoma City was officially incorporated as a town on March 15th.
2. On March 15th, 1927, the town of Picher, Oklahoma was struck by a strong tornado. The tornado caused extensive damage, including the destruction of the town's only hospital.
3. The University of Oklahoma Men's Basketball team won their first national championship on March 15th, 1947, by defeating North Carolina 43-40 in the NCAA Championship Game.
4. On March 15th, 1984, Oklahoma native Shannon Miller made her Olympic debut at the Winter Games in Sarajevo. Miller went on to become the most decorated gymnast in U.S. history, with seven Olympic medals.
5. In 2010, Oklahoma Governor Brad Henry signed a bill into law on March 15th that allowed for the use of nitrogen gas as an alternative method of execution. Oklahoma became the first state to approve this method of execution.