President:
Pres: (Continental Congress) John Jay
Pres: (Continental Congress) Samuel Huntington
General
- Natives: US Congress dispatches force into Wyoming Valley PA against Indians
- Revolution: Victory by John Paul Jones
East
- Pennsylvania: Delaware River freezes in Philadelphia, PA and remains frozen until March, marking "Hard Winter of 1779-80"
US Congress dispatches force into Wyoming Valley PA against Indians
Midwest
- Illinois: Black Canadian pioneer Jean-Baptist-Point du Sable establishes trading post – later Chicago
- Indiana: American George Rogers Clark captures Vincennes and establishes US control of Midwest
South
- Florida: Spain declares war on Britain and retakes Florida