1. In 1849, the first state normal school in the United States was established in Millersville, Pennsylvania. Originally known as the Millersville Academy, it later became Millersville University of Pennsylvania and is now one of the 14 universities in the Pennsylvania State System of Higher Education.

2. On March 10, 1864, Union General William Tecumseh Sherman launched an offensive against Confederate forces in Mississippi during the Civil War. Known as the Meridian Campaign, the operation was designed to disrupt Confederate supply lines and infrastructure in the region.

3. The Pennsylvania Turnpike, one of the first major highways built in the United States, officially opened to traffic on March 10, 1940. The toll road spans 360 miles across Pennsylvania, connecting cities such as Philadelphia, Harrisburg, and Pittsburgh.

4. In 1977, the Three Mile Island nuclear power plant near Harrisburg experienced a partial meltdown in one of its reactors, resulting in the worst nuclear disaster in U.S. history at the time. The incident, which occurred on March 28 and was caused by a combination of mechanical and human error, led to heightened safety regulations for the nuclear industry.

5. On March 10, 1996, the Philadelphia 76ers retired the jersey of legendary basketball player Julius Erving, also known as "Dr. J." Erving played for the 76ers from 1976 to 1987 and helped lead the team to its last NBA championship in 1983. He was inducted into the Basketball Hall of Fame in 1993.