Which document outlines the legal responsibilities of Marines?

The Uniform Code of Military Justice (UCMJ) is the correct answer because it is a federal law that establishes the legal framework for the military justice system. The UCMJ outlines the legal responsibilities and obligations of service members, including Marines, and sets forth the rules and procedures for military courts. It defines various offenses, establishes penalties, and ensures that service members are held accountable for their actions in accordance with military law.

The other documents mentioned serve different purposes: The Commander's Handbook provides guidance on leadership and operational procedures but does not specifically outline legal responsibilities. The Marine Corps Strategy Document focuses on the broader strategic goals and mission of the Marine Corps, lacking the legal specificity that the UCMJ provides. The Doctrine of War addresses the principles and theories of warfare, rather than the legal rights and responsibilities of Marines. Therefore, the UCMJ is uniquely positioned as the definitive source for understanding the legal obligations of military personnel.