We all probably heard for the mighty
Great Heathen Army.. It was one of the most powerfull armies in the history. After Ragner Lothbrook's death, they invaded England to revenge him. Furthermore, they didn't stopped there. Bjorn Ironside succeed to Invade even Roman Empire, France, Spain, and other civilizations. How come they didn't became a civilization with much more land, after all succesfull campaigns? After all, they didn't really made an impact to Europe. What happened after death of Ragnar's sons?