The Division Psychiatrist in large-scale combat operations

The U.S. Army's Division Psychiatrist (DIVPSYCH) has evolved from an ad-hoc "shell-shock" specialist to a multidisciplinary leader embedded within division staffs. This narrative review, based on targeted literature searches and doctrinal sources, traces 20th-21st century military history, doctrine, and policy, highlights contemporary duties, and evaluates how best to employ psychiatrists in future large-scale combat operations (LSCO). Historical experience supports proximity-based care to conserve fighting strength, while recent organizational reforms have shifted many psychiatrists toward staff and supervisory roles. Anticipated LSCO constraints, such as high casualty densities, dispersed formations, contested evacuation, and mobility, demand approaches that increase psychiatrists' clinical reach near casualties while preserving command-level consultation. We outline four courses of action (COAs) for employing future psychiatrists in LSCO: retain DIVPSYCH roles in divisions; place senior psychiatrists at corps or theater-level, with junior psychiatrists or behavioral health officers in divisions; embed more psychiatrists in field hospitals and Combat and Operational Stress Control (COSC) detachments; and create mobile psychiatric augmentation teams. Each COA is analyzed for feasibility, risks, and trade-offs. We recommend a hybrid model that balances immediate command counsel with forward clinical capacity.