In light of ongoing global military conflicts, including the Israel-Hamas war and the Russia-Ukraine war, it is imperative to study the effects of parental military service and deployment on the health and well-being of children within military families. Emerging evidence suggests that children with a parent in service appear to face unique developmental challenges associated with the military lifestyle, which differ from those experienced by civilian children. However, there is currently limited systematic research that compares the developmental outcomes of children with serving parents to their civilian peers. Therefore, the aim of this review is to synthesize existing literature on the behavioral, social, emotional, and educational functioning of children with currently serving parents in defense forces, in comparison to their civilian counterparts. This rapid systematic review was conducted in accordance with the Joanna Briggs Institute methodology framework, the Preferred Reporting Items for Systematic Reviews and Meta-Analyses, and Cochrane Rapid Review methodological recommendations The following databases were searched: Medline, PsycINFO, CINAHL, and Cochrane Central Register of Controlled Trials. Relevant online databases were searched from February 2012 to 2022 to examine the contemporary literature. Fourteen identified published quantitative studies were identified. No qualitative studies were found, and no study reported on academic outcomes. Despite considerable sample heterogeneity across studies, military children of all ages appear to be a particularly vulnerable population. Findings suggest that children in military families experience substantially higher risk for negative psychological, social, and behavioral health outcomes than their civilian counterparts, with parental deployment increasing risk across all developmental stages (i.e., early, middle, and late childhood). Among these age groups, adolescents of currently serving members showed highest risk, particularly concerning suicidal ideation and suicidal behaviors. Implications are discussed in terms of early detection, preventative interventions, and support services for families and children with a serving parent. PROSPERO registration: CRD42022313999.