ORAC,
My notion of geography is a little hazy but I did work for a Swiss company at one time, and IIRC Switzerland is kinda chock full of big white pointy things that I would hesitate to try to drive 50,000 tanks across in a hurry.
There are flat bits but they are overlooked by the big white pointy things, which in the event of hostilities would have been full of pissed off, heavily armed gnomes.