Hitlers deals and pacts
Poland in the Second World War.
But Hitler was in a hurry; he knew if he was to invade Poland it had to be done quickly, before the West could create a unified front. The Brest-Litovsk treaty of was forced upon the Soviet republic by Germany as its very survival was at stake. If Stalin's friendship with Hitler was well-nigh fatal, Professor Nisbet argues in this brief, biting study that Roosevelt's pursuit of Stalin's friendship was futile, in the course of which Roosevelt certainly undermined, if not actually betrayed Churchill, all too well aware of the nature of Stalin and his despotism.
Encyclopedia of the Cold War.