re: #304 Alyosha
I know only enough to say that after WWI that the corridor was granted as per treaty to Poland so that they had access to the sea. Alleged persecution of ethnic Germans was the casus belli for expansionism and that, I guess has been the rationale for Moscow in posting its military along the border. The hitherto unproven rough treatment of ethnic Russians.
And hi D_F
Actually, in the case of Poland the casus belli was a series of false flag attacks on Germany by the SS that were blamed on Poland. The worst of these was a train station bombing that killed 22 people.