Historical Events
- Sep 3 Flag of the United States flown in battle for the 1st time at Cooch's Bridge, Delaware, a skirmish during American Revolutionary War
Victory in Battle
Sep 11 Battle of Brandywine, Pennysylvania; Americans lose to the British, Polish soldier Casimir Pulaski saves life of George Washington
- Sep 15 George Washington, on authorization of Congress, appoints Casimir Pulaski as brigadier general in Continental Army cavalry
- Sep 19 Battle of Freeman's Farm (Bemis Heights) or 1st Battle of Saratoga
Battle of Interest
Sep 20 Battle of Paoli; British forces under Major General Charles Grey attacks Brigadier General Anthony Wayne's encampment. Claims the British gave no quarter leads to engagement becoming known as the "Paoli Massacre"
Historic Event
Sep 26 British General William Howe occupies Philadelphia during American Revolution
- Sep 30 Continental Congress, flees to York, Pennsylvania, as British forces advance
