warfare also was commonly initiated as a result of suspicions of acts of sorcery or theft committed by other groups. physical markings of a sorcery attack included skin-damage, swelling, psychotic behavior, and fainting. if a member of a tribe fell ill and displayed these symptoms, then sorcery was typically suspected. clans, by default, typically presumed innocence for their own members. thus, suspects of sorcery and theft were normally members of rival clans.