What if Hitler fully endorsed this plan?
http://en.wikipedia.org/wiki/National_redoubt Another similar idea for Mussolini : "Republican Alpine reduct in Valtellina.In 1945 "national redoubt" was the English term used to describe the possibility that German dictator Adolf Hitler and armed forces of Nazi Germany (Wehrmacht) would make a last stand in the alpine areas of Austria, Bavaria and northern Italy in the closing months of World War II in Europe. In German this concept was called the Alpenfestung (Alpine Fortress). Although there was some German military planning for a stand in the Alpine region, it was never fully endorsed by Hitler and no serious attempt was made to put the plan into operation.
These reports found their way into the popular press in the last months of the war. Time wrote in February 1945:
But what of the top Nazis who cannot hide? With a compact army of young SS and Hitler Youth fanatics, they will retreat, behind a loyal rearguard cover of Volksgrenadiere and Volksstürmer, to the Alpine massif which reaches from southern Bavaria across western Austria to northern Italy. There immense stores of food and munitions are being laid down in prepared fortifications. If the retreat is a success, such an army might hold out for years
http://it.wikipedia.org/wiki/Ridotto_alpino_repubblicanoRSI and Mussolini think to fight the last stand in the fascist Alpine Reduct of the Valtellina .