Thomas Bateman’s excavations of a likely burial site for members of this group at Heath Wood revealed a series of cenotaph mounds. The Annals of St. Neots claimed that this group only won battles in which the raven at the center of their banner appeared to be alive. A similar group named for summer joined (15[1])with this group under the command of Bagsecg (“BAIS-edge”). According to a tale, the leaders of this group formed it to seek revenge for the (15[1])(*) snake pit execution of their father. This group’s leaders (10[1])included the duke Ubba (10[1])and Ivar the Boneless. The remnants of this group signed the Treaty of Wedmore after their defeat (10[1])at the Battle of Edington, as recounted by the bishop Asser. This group’s leader Guthrum agreed to be baptized after meeting with Alfred the Great. For 10 points, name this Viking coalition that invaded England in the 9th century. ■END■ (10[1])