Marcus Aurelius wrote:
Well, you don't have to take all of Norway to render the German troops in northern Norway essentially impotent. Trying to supply that many troops through Finland would be almost impossible, since there were (and still are) no railways that go directly from Finland to Norway and the roads at the time were very few and in poor condition. With southern Norway in Allied hands Germans could not have utilized coastal shipping lanes.
Impotent? More impotent then troops sitting in a garrison waiting for an attack that will never come already are? If you don’t take the iron ore mines by force, nothing is accomplished. Southern Norway was absurdly heavily defended, and well garrisoned by troops capable of moving around. North Norway had heavy defenses and many troops, but they had little mobility compared to a force that controlled the sea. And actually Finland was supplied via Norway, not the other way around, though the Germans had built a new road through Finland by the end of 1942 for this purpose. A historical deception operation related to Overlord was aimed at Stavanger though.
Seriously now, the Germans poured resources into Norway without the allies attacking, far more then they ever should have. Why on earth attack the most heavily defend spot the allies possibly could in hope of an economic advantage that could take over a year to do anything? It doesn’t make sense and that’s why invading Norway was never a serious proposal at all after the allied withdrawal in 1940.
Furthermore, with southern Norway in Allied hands political pressure would probably be enough for Sweden to cut or at least severely limit iron ore shipments to Germany.
Political pressure does not triumph military pressure, Hitler can order bombers over Stockholm and nothing really existed to stop them because Sweden had no radar and relatively few fighter planes. This is especially true in 1943 when the Luftwaffe was still a significant bomber force. Furthermore even if the ore supply was cut off the situation is not as it was in 1940 as I already pointed out. The Germans had gained more iron ore in France, and several other countries. So even cutting off the supply entirely would take a long time to have any effect on the Germans.
After Stalingrad and Kursk the Swedish government was already trying to distance itself from Germany, whose defeat seemed unavoidable, but historically the threat of German invasion was still real in 1943 and Sweden was at that point completely isolated, so the government had to play it safe.
Yeah and the threat of invasion would probably turn into an actual invasion of Sweden tried to defy Hitler so openly. Especially if the allies had landed in southern Norway, and thus have no direct means of aiding the Swedes until months of absurdly hard fighting up narrow mountain valleys. An attack on Narvik would make more sense if the goal was to be cutting off German iron ore. Then you gain a direct route to supply the Sweds with weapons and reinforcements.
I also don't know who said that the invasion of Norway would be an alternative to invasion of France. It wasn't me for sure. The whole idea was that it would be alternative to invasion of mainland Italy. It is fairly obvious that you could not invade Germany solely through Denmark, but as a supportive route it is a much better and more realistic prospect than the alpine passes. As for the difficulty of the task, I already noted that it would be more risky than Italy and significantly so, but also with substantially higher potential of strategic benefits.
And its not a zero balance one or the other choice. The allies invaded Italy in part because they already had large forces in the Mediterranean. You want to invade Norway? Well then shifting those troops, retraining and reequipping them to make heavily opposed landings in a truly mountainous country that becomes artic like in winter will take months. It might not even be possible to mount the operation before the winter of 1943 sets in, meaning the western allies just do NOTHING for the rest of 1943. In addition such an operation will surely eat up more amphibious shipping. At least to invade Italy the British force could mostly just be ferried across from Sicily with minimal effort. Everything going to Norway takes an all out amphibious effort. In short, doing this will probably delay the invasion of France even longer then Italy already did and may not economically damage the Germans mid to late 1944 when allied troops were historically approaching the Siegfried line and the Rhur anyway.
Meanwhile France in 1943 was almost wide open. The Germans only had about 600 tanks, none better then a Panzer III in the whole place; and virtually no beach defenses outside the immediate area of major ports at all. It was very close to allied bases, had terrain that did not heavily favor the defenders nor require special equipment and it was the only direct path to certain victory over the Nazis. Allowing the Germans to survive into 1944 without a second front was an immense blow to the western allies. The forces they fielded in France latter were far strong as a result of the huge surge in German armaments production and the extra year of fortifications construction.
Picking around the peripheral edge of the Nazi Empire is what Churchill wanted and was pretty well based on British history as a sea power with little in the way of an army that was happy to take 20 years to defeat the enemy. It is not a way to win the war any faster or with any fewer losses. Frostbite in Norway might well claim more men then Nazi bullets. Substituting one peripheral operation for another is fairly pointless.
"This cult of special forces is as sensible as to form a Royal Corps of Tree Climbers and say that no soldier who does not wear its green hat with a bunch of oak leaves stuck in it should be expected to climb a tree"
— Field Marshal William Slim 1956