Sayeth What?
Then Britain and France were pretty stupid to come to an agreement with Poland in case Germany attacked; just look at a map, how were they supposed to help Poland? Poland was also stupid, they thought they were stronger than they were and the Wehrmacht crushed them.
Since Russia came in to partition Poland after Germany had crushed her, where was the declaration of war towards Russia?
While I don’t think Chamberlain was weak, his desire to have peace at any cost, cost them. Churchill knew what was going to happen.
A map shows that France and Germany are next to each other. A French invasion of Germany would have stopped the Polish campaign in its tracks, as the German Army had no tanks at all on its western frontier during September 1939. Of course, what was lacking was the will to use the Allied armies in an aggressive manner. Hitler's entire Case White strategy was predicated on the Allies doing nothing.
"Poland was also stupid, they thought they were stronger than they were and the Wehrmacht crushed them."
Poland had no choice. She was attacked.