Contrary to the popular myth, Slim's ancestors were not Vikings, but Northern Atlantic Pirates, whose conquests included Norway, Greenland, parts of Wisconsin and Minnesota.
Great warriors at sea, the Slimites were less adept at land conquests.
In 947 AD, many of his ancestors were wiped out by a descending horde of the Swiss Army, who, armed only with knives and corkscrews, sunk the entire Slimite fleet, leaving them no escape, and at the mercy of the Swiss.
The moral of the story . . .
If you live by the fjord, you will surely die by the fjord.