1st Lithuanian–Belarusian Division

Dywizja Litewsko-Białoruska, 1.DL-B; Belarusian: 1-ая Літоўска-Беларуская дывізія; Lithuanian: 1-oji Lietuvos-Baltarusijos divizija) was a volunteer unit of the Polish Army formed around December 1918 and January 1919 during the Polish–Soviet War.

Self-Defence units were organized in the areas of the Kresy region with Polish majorities or significant minorities – usually urbanized areas like the cities of Vilnius, Minsk, Hrodna, Lida and Kaunas, or towns like Ašmiany, Wilejka, Nemenčinė, Świr and Panevėžys; until December 1918 those units had no central command or organization and many of them were named after the local cities or regions (like 'Samoobrona Lidy').

[4] The initial core of the division was formed in December 1918 in Minsk, where a group of roughly 1,500 Poles and Belarusians rose to arms to defend the city against the advancing forces of Soviet Russia.

[8][9] However, due to Russian numerical superiority and lack of support from the side of the short-lived Belarusian People's Republic, the group withdrew towards central Poland.

[10] Another large group of volunteers to join the division were the remnants of roughly 2,500 men strong force created in Vilnius to defend it against the Reds in January 1919.

The division suffered heavy casualties during the Soviet invasion in summer 1920; some soldiers were forced to retreat into Lithuanian territory where they were interned by the Bolsheviks.