Reminders of in-group wrongdoing can prompt defensive responses that affect intergroup relations. Across two studies, American participants were randomly assigned to have their American identity increased (or not), then read a passage describing the negative treatment of Native American Indians by perpetrators described as either early Americans (i.e., in-group members) or European settlers (i.e., out-group members). Memory for the content of the passage and feelings of collective guilt were assessed. Participants demonstrated poorer memory when the perpetrators were framed as in-group (Americans), rather than out-group (Europeans), members. Further, participants in the in-group perpetrator condition whose American identification was primed experienced less collective guilt compared with participants in the in-group perpetrator condition whose American identification was not primed. Implications for intergroup relations and the understanding of collective memory are discussed.