Vikings season 6: Was Bjorn Ironside real? How did he die?

VIKINGS season 6 has reached its midseason finale on the History Channel in the USA and Prime Video worldwide. Was Bjorn Ironside real and how did he die?

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Spoilers] (S06E11) The man who could not die. : r/vikingstv

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Vikings season 6: Did the real Ivar the Boneless kill Bjorn Ironside?, TV & Radio, Showbiz & TV

Vikings' Season 6: Is [SPOILER] Really Dead? Fans Weigh In