This option begins with Allied strategy after Germany invaded France. The Allies would redouble their effort in Norway and force Germany into a two-front war. Norway's terrain would limit the usefulness of the German armoured forces sent there, yet the alternative would still be destructive. A longer campaign would turn Norway into a battlefield and expose its population to far more damage. Allied commitment could impose costs on Germany while transferring the fighting to the country being defended.
Notable Point · 2:39-3:37
What if the Allies had not abandoned Norway for France?
A separate counterfactual asks the Allies to reinforce Norway after Germany attacks France, forcing Berlin to sustain campaigns on two fronts.