Sometimes works of fiction are based on historic events, but Vinland Saga takes this concept a step further trying to rewrite the 11th century's exploration of North America and the rise of King Cnut, ruler of England, Denmark and Norway. Season one is a long winded tale of a young boy seeking revenge in a midst of a viking invasion. It's certainly more Heimskringla(King's Saga) than Vinland Saga at this point.