Republic of Central Lithuania

The Republic of Central Lithuania (Polish: Republika Litwy Środkowej, Lithuanian: Vidurio Lietuvos Respublika), commonly known as the Central Lithuania, and the Middle Lithuania (Polish: Litwa Środkowa, Lithuanian: Vidurinė Lietuva, Belarusian: Сярэдняя Літва, romanized: Siaredniaja Litva), was an unrecognized short-lived puppet state of Poland, that existed from 1920 to 1922. It was founded on 12 October 1920, after the successful Żeligowski Mutiny, during which the volunteer 1st Lithuanian–Belarusian Division under the command of general Lucjan Żeligowski seized the Vilnius Region – the capital region of Lithuania.

Source: Wikipedia — Republic of Central Lithuania (CC BY-SA 4.0)