They didn't. The Vikings ruled large parts, certainly but virtually all of it was islands, not mainland. They were defeated at Battle of Largs in 1263.
fgtggdfv
France, Ireland, Scotland, England.
because...
yes they did
the aboriginals had thought that the vikings were going to attack them
Vikings did not have the right to attack on other countries. They should of stay out of the way.
The Vikings.
At various times in its history, Scotland has been invaded by the Irish, Vikings, Romans, English.
Around Scandinavia.
Because they wanted to : )
Viking raids
There are old Viking settlements in the Shetland Islands.