The TM 31-210 Improvised Munitions Handbook is a United States Army technical manual intended for the United States Special Forces describing manufacture of improvised weapons and explosives from readily available materials, from junk piles, common household chemicals and supplies purchased from regular stores. It was first published in 1969 by the Department of the Army. The Improvised Munitions Handbook is one of the best references on how to manufacture improvised explosive devices, and some of the constructions described have been used against U.S. troops themselves.