This United States Army publication, Field Manual FM 3-18 Special Forces August 2026, 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. 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 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.