1. On August 22, 1775, the Second Continental Congress established the United States Post Office, which played a vital role in connecting and unifying the country during its early years.

2. In 1791, the first U.S. patent was issued to John Fitch, a resident of Bucks County, Pennsylvania, for his invention of a steamboat that could travel against the current of a river.

3. On August 22, 1864, during the American Civil War, Confederate troops under General Jubal Early advanced on Pennsylvania, leading to the Battle of Summit Point, which resulted in a Union victory.

4. In 1901, the first electric trolley line in Pennsylvania began operation in Scranton, revolutionizing transportation in the state and allowing for easier travel between cities and towns.

5. On August 22, 1972, Hurricane Agnes made landfall in Pennsylvania, causing widespread flooding and damage throughout the state. The storm resulted in over 50 deaths and billions of dollars in damages, making it one of the costliest natural disasters in Pennsylvania history.