FM 3-18 is the principal manual for Special Forces (SF) doctrine. It describes SF roles, missions, capabilities, organization, mission command, employment, and sustainment operations across the range of military operations. This manual is a continuation of the doctrine established in the JP 3-05 series, ADP 3-05, ADRP 3-05, and FM 3-05. The principal audience for FM 3-18 is all members of the profession of arms. Commanders and staffs of Army headquarters serving as joint task force (JTF) or multinational headquarters should also refer to applicable joint or multinational doctrine concerning the range of military operations and joint or multinational forces. Trainers and educators throughout the Army will also use this publication. Commanders, staffs, and subordinates ensure their decisions and actions comply with applicable United States, international, and, in some cases, host-nation laws and regulations. Commanders at all levels ensure their Soldiers operate in accordance with the law of war and the rules of engagement. (See FM 27-10.) FM 3-18 uses joint terms where applicable. Selected joint and Army terms and definitions appear in both the glossary and the text. FM 3-18 applies to the Active Army, the Army National Guard (ARNG)/Army National Guard of the United States, and the United States Army Reserve (USAR) unless otherwise stated. The proponent of FM 3-18 is the Special Operations Center of Excellence. The preparing agency is the SF Directorate, United States Army John F. Kennedy Special Warfare Center and School.