Which documents serve as the basis for professional Marine Corps ethics?

The basis for professional Marine Corps ethics is primarily established by the Code of Conduct and the Uniform Code of Military Justice (UCMJ). The Code of Conduct outlines the fundamental ethical principles that Marines are expected to uphold, including loyalty, duty, and respect for others. It serves as a guiding framework for how Marines should behave in various situations, especially when under duress or facing ethical dilemmas.

In addition to the Code of Conduct, the UCMJ plays a critical role in defining lawful and unlawful behavior for military personnel. It sets legal standards and consequences, thereby reinforcing the ethical expectations established in the Code of Conduct. Together, these documents provide a comprehensive structure that ensures Marines maintain integrity and accountability in their actions, reflecting the values and traditions of the Marine Corps.

The other options, such as the Manual of Military Justice, Drill and Ceremony Manual, and Leadership Principles Guide, while important in their respective domains, do not directly address the ethical foundation in the same way. The Manual of Military Justice relates to legal proceedings and military law, the Drill and Ceremony Manual focuses on ceremonial procedures and formations, and the Leadership Principles Guide outlines effective leadership techniques but does not specifically anchor ethical behavior.