King Ivar the Boneless was a legendary Viking leader and a prominent figure in Norse history. He is often associated with the Great Heathen Army, which invaded England in the late 9th century. Ivar was known for his strategic prowess and played a significant role in the Viking conquests of various kingdoms. Despite his nickname, which suggests a physical disability, Ivar was a formidable warrior. He was one of the sons of Ragnar Lothbrok, a famous Viking hero, and his exploits are chronicled in various sagas and historical texts. Ivar's legacy continues to influence popular culture, particularly in television series like Vikings.