- Preceded by World War I, Russian Revolution and Polish-Ukrainian War
- Russia expanded westward and annulled the Treaty of Brest-Litovsk
- Poland aimed to restore pre-1722 borders
- Kiev offensive launched in 1920
- Polish victory at the Battle of Warsaw in 1920
- Ended with the Peace of Riga in 1921
- Border established about 200 km east of the Curzon Line