1. In 1777, the Battle of Brandywine was fought in Pennsylvania during the Revolutionary War. The battle led to a British victory and resulted in Philadelphia being occupied by British troops.

2. The University of Pennsylvania, one of the oldest universities in the United States, was founded on September 26, 1740, by Benjamin Franklin. The university is located in Philadelphia and is known for its prestigious academic programs.

3. On September 26, 1862, Pennsylvania Governor Andrew Curtin called for volunteers to join the Union Army during the Civil War. Pennsylvania played a significant role in the war, contributing more troops than any other state in the Union.

4. One of the deadliest mining disasters in American history occurred on September 26, 1869, in Avondale, Pennsylvania. Over 100 miners were killed in a fire accident, which was a significant wakeup call for mine safety regulations in the United States.

5. In 1983, Philadelphia Mayor W. Wilson Goode declared a state of emergency in response to the actions of the radical group MOVE. The group had been occupying a house in the city for several years, and the standoff eventually resulted in the intentional burning of the house by city officials, resulting in 11 deaths and a significant loss of property damage.