Field manual 31-21 covers the doctrine and principles for organizing, training, commanding, and exploiting guerilla forces in war.

History

• 1977
• 1974
• 1969-02-14: Change No. 1 [pdf]
• 1965-06-03: Special Forces Operations [pdf]
• 1963-09-04: Change No. 1
• 1961-09-29: Guerrilla Warfare and Special Forces Operations, [pdf]
• 1958-05-08: This revision, Guerilla [sic] Warfare and Special Forces Operations, [pdf] supersedes FM 31-20, 10 August 1955, too.
• 1955-03-23
• 1951-10-05: Organization and Conduct of Guerilla [sic] Warfare [pdf]

Reference

• "Framework for Counterguerrilla Tactical Doctrine: A Theoretical Approach" [pdf]