- Dec 17 Russian army of Grigory Potemkin assaults and captures the fortress of Ocharov in modern day Ukraine after a 5 month long siege in one of the major events of the Russo-Turkish War
- Dec 19 Chinese troops occupy capital Thang Long Vietnam
- Dec 21 Hue Tay Son becomes emperor Quang Trung of Vietnam
- Dec 23 Maryland votes to cede a 10 square mile area for District of Columbia