... but it was a major contributing factor to the Nazis decision to forgo an invasion attempt during WWII. With impassable terrain and trained armed citizens, the casualties would have been horrific for little ground gained.
QUOTE]
Well I just lost an extended post on the Swiss military position in WWII. The above is a very simplistic view of history.
Here is a good
link regrading Swiss military planning in the early part of WWII. Suffice to say they had a total force of 500,000 men of which approx 250,000 were mobilized at any one time, next to no significant armour and approx 250 aircraft which should be compared to the 3.3 million German soldiers, 600,000 axis soldierswith 3.350 tanks and 4389 aircraft the Germans massed for operation Barbarossa. Given that a 3:1 superiority in men and equipment is considered sufficient to conduct a succesful attack do the math. The terrain you cite was to be used for a final redoubt but would not sustain the population or military operations for a great length of time.
Admirable as their planning and training were the Swiss were under no illusions about the final outcome of a military action. They relied on the ideal that the Swiss financial system was of benefit to other countries and that they had no oil or other strategic resources to make them a useful strategic goal relative to the cost of invasion. Hitler never the less planned operation Tannebaum.
Ultimately the Germans chose to invade the Soviet Union and when the planned coup de main failed to occur by the winter of 1941/42 they found themselves bogged down in a war they couldn't realistically win. That is what really saved the Swiss and several other countries.
AS to the original topic of the OP I choose to remain neutral - I just hate to see history taken out of context.