I have been reading a short book on inherited from my father called @ordeal by Battle' written during WW2 by Captain Cyril Falls - then Military Correspondent of 'The Times'. In it he talks about the way a number of neutral nations sat there desperately hoping that Germany would not attack them and allowing themselves to be picked off one at a time.
It made me think how short-sighted some of these nations were. The classic would be Poland (I hope Jozef is not on this site) who ganged up with Germany and Hungary over the dismantling of Czechoslovakia only to be attacked and overrun a year later. What is Poland had supported the Czechs, perhaps getting Cieszyn as price for their support. Germany would not have been strong enough in 1938 to have taken on both Poland and the Czechs. Also with Belgium, Luxemburg, and to a lesser extent the Netherlands, after the German occupation of Denmark and attack on Norway, if not earlier, it should have been obvious to them that Germany would not respect their neutrality during an offensive in the west. They would have been better allowing British and French forces to move in instead of waiting until they were attached.