The main antagonist in Vikings, Ivar the Boneless, met his fate in the final episode, but how did Ivar the Boneless die, and how does his death in Vikings compare to the end of the real Ivar the Boneless? Ivar the Boneless' death and real life inspiration are examples of how Vikings loosely interprets history. Vikings has now come to an end after six seasons, and it brought the stories of Ragnar’s sons to an end, but not all of them continue after the events of the series. The cruel and seemingly indestructible Ivar dies in battle after seeing Hvitserk exhausted and injured and struggling to keep fighting.
https://screenrant.com/vikings-true-story-ivar-boneless-death-how/