text: leader of this ethnicity was forced to convert to Christianity after signing the treaty of Wedmore.
full_question: leader of this ethnicity was forced to convert to Christianity after signing the treaty of Wedmore. Another one of these people, whose life was depicted in the Chronicle of John of Wallingford, may have led attacks in reaction to the death of his sister Gunnhilde. These people were killed in the St. Brice's Day Massacre on the orders of Aethelred the Unready. One of these people named Guthrum signed a treaty creating an autonomous region for them after losing the Battle of Edington. Taxes paid to them to prevent raids were known as their namesake "geld." For 10 points, name these people who controlled England under Sweyn Forkbeard and Canute, and who were often Vikings.
first_sentence: leader of this ethnicity was forced to convert to Christianity after signing the treaty of Wedmore.
raw_answer: Danes [or Danish people; prompt on "Vikings"]