Map of planned border (thick blue line) for the en:Lithuanian–Belorussian Soviet Socialist Republic (commonly known as Litbel) superimposed on state borders in 1922.

  Germany
  Latvia
  Poland
  Lithuania
  Socialist Soviet Republic of Byelorussia
  Klaipėda Region (detached from Germany by the Treaty of Versailles)
Note: all cities have their current names, except for three cities in the Kaliningrad Oblast as their names were radically changed after the World War II.
Map_of_Litbel_1919.svg
Map_of_Litbel_1919.svg: Renata3
derivative work: Bladyniec (talk)