The purpose of this paper is to introduce the concept of "Historical Trauma" (HT) as described by Brave Heart (2000), using attachment theory as a basis for analysis. In particular, the concept of boarding school experiences such as the Carlisle schools and continued foster care for tribal children are areas of interest that can be investigated using attachment theory. Furthermore, many programs are being developed around the concept of HT that could use the organizing theory of attachment to explain and predict potential outcomes of the programs. The article addresses some of the original research on HT as well as the research linking intergenerational trauma with attachment theory. Suggestions for future studies are discussed including recommendations for HT and attachment researchers to work together to investigate these theories.