What are the three functions of the Marine Corps?

The three functions of the Marine Corps focus on their foundational mission, which is to develop capable and effective Marines, conduct combat operations successfully, and ensure that Marines return to civilian life as responsible and productive citizens. "Make Marines" emphasizes the importance of training and transforming individuals into disciplined and skilled members of the Marine Corps. "Win Battles" reflects the primary purpose of the Marine Corps, which is to engage in and succeed in military operations to defend the nation. "Return Quality Citizens" emphasizes the responsibility of the Marine Corps to not only serve the country but also to support the personal development of Marines as they transition back to civilian life, ensuring they contribute positively to society.

In contrast, other choices center on varying aspects of military operations or duties that, while important, do not encapsulate the core mission of the Marine Corps in the same comprehensive manner. The focus on international relationships, border security, and humanitarian efforts is more aligned with broader military or government objectives rather than the specific identity and foundational roles of the Marine Corps.