Field Manual (FM) 31-20 is the Special Forces (SF) principles manual. It is directly linked to and must be used in conjunction with the doctrinal principles found in FMs 100-5 and 100-20 and the projected FM 100-25. It describes SF roles, missions, capabilities, organization, command and control, employment, and support across the operational continuum and at all levels of war. It provides the authoritative foundation for SF subordinate doctrine,...