Abstract:When a military parent deploys, the effects can be felt throughout the family. The family system needs to adjust to the absence of one parent, and that process can be emotionally and mentally taxing. Children of deployed parents are known to exhibit internalizing and externalizing behavioral issues at home and school during their parent’s deployment. While typical children are frequently the subjects of such studies, the effects of parental deployment on children who are neurodivergent needs further exploration. This study looked at three cases of children with autism using retrospective data collected during the normal course of their applied behavioral analysis (ABA) therapy sessions, which occurred over the course of their parent’s military deployment. This study examined the behaviors of non-compliance, tantrums, aggressive behaviors, and self-regulation using a combination of single subject designs tailored to each participant. Behavior changes were compared across deployment phases using visual analysis, and the effect size measures Non-overlap of All Pairs (NAP) and Tau-U. This study found differences in the participants’ aggressive behaviors, which appeared to increase in the parent’s first deployment phase and carried on into the post-deployment phase. Aggressive behaviors included aggression towards others, self-injurious behaviors, and aggression towards objects or session materials. Future studies should further investigate the relationship between a parent’s deployment and aggressive behaviors in children with autism.