Read it some years ago in the interwebs.

During the first days of World War II, a Wehrmacht general was touring Germany’s border with Switzerland with a bunch of butt-kissing Journalists. At a checkpoint, one journalist asked the General if there were plans for dealing with Switzerland in case they decided to break their neutrality. The General scoffed and said that the Swiss were not an issue and that they wouldn’t dare take any action against the mighty Third Reich. “I ask you, what can 500,000 Swiss do against a one million Wehrmacht Soldiers?”

“Shoot twice.” answered a voice on the Swiss side of the checkpoint.