Field manual 31-20 addresses how to use conventional forces against the guerrilla threat.

History

• 1958-05-08: Superseded by FM 31-21.
• 1955-08-10: U.S. Army Special Forces Group (AIRBORNE)(U) [pdf]
• 1951-02-01: Operations against Guerilla [sic] Forces

Reference

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