The Army of Central Lithuania was the armed forces of the state of Central Lithuania proclaimed by General Lucjan Żeligowski on October 12, 1920.

The Republic of Central Lithuania, commonly known as the Central Lithuania, and the Middle Lithuania, was an unrecognized short-lived puppet state of Poland, that existed from 1920 to 1922. It was founded on 12 October 1920, after successful Żeligowski's Mutiny, during which the volunteer 1st Lithuanian–Belarusian Division under command of general Lucjan Żeligowski seized the Vilnius Region that Lithuania made claims to. It was incorporated into Poland on 18 April 1922.