1. In 1775, the Battle of Machias was fought in Maine, which is now part of Pennsylvania. This was a battle between British forces and American rebels during the early stages of the American Revolutionary War.

2. In 1863, Confederate General J.E.B. Stuart's cavalry raided Chambersburg, Pennsylvania, during the Civil War. This action was part of the Gettysburg Campaign.

3. In 1900, the first car race was held in Philadelphia, which was also the first automobile race in the United States. The race was held on a dirt track at the Philadelphia Driving Park in Fairmount Park.

4. In 1979, the Pennsylvania State Supreme Court declared that the state's education funding system was unconstitutional. The ruling argued that the state's reliance on local property taxes to fund public schools created an unequal distribution of resources and violated the state constitution's guarantee of equal access to education.

5. In 2016, a federal court struck down a restrictive voter ID law in Pennsylvania, which required voters to have certain forms of identification before casting their ballots. The law had been challenged by civil rights groups who argued that it disproportionately targeted minority and low-income voters who were less likely to have the required forms of ID.