Which part of the MCM includes the source of military jurisdiction?

The source of military jurisdiction is fundamental to understanding the legal framework within which military personnel operate. The preamble of the Manual for Courts-Martial (MCM) provides context on the authority and scope of military law, establishing the legal foundation for why military personnel are subject to court-martial and military justice. It outlines the purpose of the MCM and reflects the principles of military jurisdiction, which can include the unique status of service members and the need for military discipline and order. This foundational information within the preamble is essential for interpreting how and when military jurisdiction is applied, making it the correct choice in this context.

The other parts of the MCM, including the rules for court-martial, military rules of evidence, and punitive articles, delve into the procedures and specific laws applicable within military justice, but they do not specifically define or explain the overarching source of military jurisdiction itself.