1. In 1777, during the American Revolution, a battle known as the Battle of Princeton took place. General George Washington led his troops to victory against the British army and it is considered one of the most significant battles of the war.

2. In 1896, the Pennsylvania State Normal School (now known as East Stroudsburg University) was founded. It was the first college in Pennsylvania to offer degrees in education, and it remains a respected institution for teacher training today.

3. In 1927, the world's first recorded radio drama was broadcast from a station in Pittsburgh. Called "The Arsenal of Democracy," it was a play about the weapons industry during World War I.

4. In 1945, the Franklin Institute in Philadelphia hosted the first public demonstration of a television broadcast in color. The demonstration was presented by RCA and the public was amazed by the vivid colors on the screen.

5. In 2005, Pennsylvania became the first state to implement a law requiring all public and private schools to have automated external defibrillators (AEDs) on site. This law has saved many lives by providing quick access to critical medical devices in case of sudden cardiac arrest.