Predating Bacon's Rebellion, the Anglo-Powhatan Wars instituted the distinct hierarchical separation and selfishness between the Indians and the Virginians that would eventually mold into the basis for the subduing of the Indians during Bacon's Rebellion. Following a raid by Doeg Indians in Stafford County, Virginia, in which were killed two white settlers associated with a trader named Mathews (whom later reports found regularly "cheated and abused" Indians), a group of Virginia militiamen raided settlements of the Susquehannock tribe, instead of the Doeg tribe, including some across the Potomac River in Maryland. Maryland Governor Calvert protested against the incursion, and the Susquehannocks retaliated. Maryland militia then joined Virginia forces, and attacked a fortified Susquehannock village. After five chiefs had accepted the Maryland leader's invitation to parley, they were slaughtered, an action which provoked later legislative investigations and reprimands. The Susquehannocks retaliated in force against plantations, killing 60 settlers in Maryland and a further 36 in their first assault on Virginia soil. Then other tribes joined in, killing settlers, burning houses and fields and slaughtering livestock as far as the James and York rivers.