The in your query remains a tantalizing clue. It might be a paragraph about the 25 most dangerous intersections in an urban fight, a figure diagramming 25 ways to scale a wall, or Annex 25’s “Assault on a Vertically Partitioned Target.”
Introduction: A Phantom Manual for a Concrete Jungle In the annals of modern military doctrine, few documents have carried the mystique of FM 31-28 (FOUO), titled Special Forces Advanced Urban Combat , effective 1 December 1999 . Unlike its predecessor, the conventional FM 90-10 (Military Operations on Urbanized Terrain) , this manual was not for line infantry or mechanized battalions. It was written specifically for the green berets of the U.S. Army Special Forces (SF), the “quiet professionals” who operate in small teams behind enemy lines. The in your query remains a tantalizing clue
Regardless, FM 31-28 (FOUO) stands as a milestone: a manual written in the brief twilight of the pre-9/11 world, anticipating the urban battles of Fallujah, Mosul, and Mariupol. It was a docent for the dark corridors and high rooftops where special forces still fight – one mousehole at a time. Disclaimer: The U.S. Army does not endorse the release of current FOUO or classified documents. This article is for historical and doctrinal analysis based on unclassified, declassified, and academic sources. Do not attempt to distribute or obtain restricted records. It was written specifically for the green berets of the U
The identifier likely refers to a specific paragraph, annex, or figure number within the document — perhaps detailing a 25-point urban breaching checklist, a 25-meter engagement drill, or Annex 25 covering underground tunnel networks. While the physical “FOUO” (For Official Use Only) stamped copies from 1999 have largely been recalled or destroyed, their doctrinal DNA survives in today’s urban warfare training at the SWCS (Special Warfare Center and School). It was a docent for the dark corridors