The Last Kingdom: Seven Kings Must Die is the conclusion of the Last Kingdom TV series, and while the series has always paralleled real-life historical events, there are some major changes the movie makes to the true story of the Early Middle Ages in England. Netflix's The Last Kingdom: Seven Kings Must Die is a straight-to-streaming sequel to the five-season historical drama based on The Saxon Stories by Bernard Cromwell. The series follows Uhtred Ragnarsson — or Uhtred of Bebbanburg, as he comes to be known — a Saxon raised by Danes who is on a lifelong quest to regain his lordship of his family’s castle and lands.
https://screenrant.com/last-kingdom-seven-kings-die-true-story-accuracy-changes/