Polish borders as of 1918 are here - https://pl.wikipedia.org/wiki/Historia_Polski_(1918%E2%80%931939)#/media/File:Republic_of_Poland_in_mid_November_1918.PNG h

Polish borders as of 1918 are here - https://pl.wikipedia.org/wiki/Historia_Polski_(1918%E2%80%931939)#/media/File:Republic_of_Poland_in_mid_November_1918.PNG https://pl.wikipedia.org/wiki/Historia_Polski_(1918%E2%80%93... Soviet Union decided to attack, it lost the war, it had to ceede territory.