In their lifetime these lords of the seas terrified the world, causing 8th-century Europe to pray for deliverance.
Here is the real history of the Vikings - Danes, Norse and Swedes. They ploughed the seas in their long boats, voyaging as far as Greenland and discovering America. They colonized Iceland, pillaged Ireland, and put France to fire and sword. They sailed to the gates of Constantinople and seized the throne of the Tsars. Finally, under William the Conqueror, their descendants subjugated England. They sailed out of history into the realm of legend.