The U.S. Department of the Army is headquartered at the Pentagon in Arlington, Virginia, and authors The Soldier's Guide, The Complete Guide to Edible Wild Plants, U.S. Army Ranger Handbook, U.S. Army Hand-to-Hand Combat, U.S. Army First Aid Manual, U.S. Army Weapons Systems, U.S. Army Special Forces Handbook, U.S. Army Guide to Boobytraps, U.S. Army Explosives and Demolitions Handbook, U.S. Army Special Forces Guide to Unconventional Warfare, and U.S. Army Special Forces Medical Handbook.