What if Belgium (and Luxembourg) were not neutral? Instead, both were openly allied to France and Britain, particularly the latter. With the coming of war in 1939 the French and British deploy their troops forward to the Belgian / German border. How would this have effected the outcome of the campaign in the West? My suspicion is that it would have ended much like WW 1 in a horrible stalemate rather than a crushing defeat of France. But, the possibility also exists that the Germans have an easer time as France and Britain (along with Belgium) leave the Ardennes largely unguarded and have no major reserves deployed to stop a breakthrough there. I think this scenario, Belgium historically was aligned with France and Britain for most of the interwar period, is plausable. Comments?