re: Why didn't Germany invade Switzerland?

Military channel did a show on this. They were ultimately going to first try and annex them like they Did with Austria, and, failing that, invade, but not until they had taken care of England. When that got upended and Hitler turned his attention to Russia invading Switzerland obviously got put way on the back burner. Way too much of a hassle with the mountains and it was not of any strategic /military significance to justify invasion before knocking out the Allies.