Switzerland used to be surrounded by Nazi Germany on pretty much all sides.
They remain independent because they are a mountainous country that set its defenses up cleverly so that any invasion would be a pyrrhic victory at best.
They remain independent because they are a mountainous country that set its defenses up cleverly so that any invasion would be a pyrrhic victory at best.
Nazi Germany did not invade Switzerland, because Switzerland was actually more useful as a neutral state for Nazi Germany to exchange gold for commodities, for spying and Switzerland produced militiary equipment for Nazi Germany anyway.
Switzerland didn't end up getting divided between Germany and Italy thanks to the Red Army hurtling more humans west than the Wehrmacht could supply bullets east. Swiss munitions production wouldn't be risked.