[0] https://en.wikipedia.org/wiki/Molotov%E2%80%93Ribbentrop_Pac... [1] https://en.wikipedia.org/wiki/Soviet_invasion_of_Poland
[0] https://en.wikipedia.org/wiki/Molotov%E2%80%93Ribbentrop_Pac... [1] https://en.wikipedia.org/wiki/Soviet_invasion_of_Poland