ABSTRACT. Camouflage and concealment are essential parts in the modern military tactics specially after the increasing in the target recognition and acquisition accuracy by means of reconnaissance and sensors systems. The ability of gathering accurate overhead imagery for targets has increased dramatically over the last decades. Gathering information concerning important installations, by means of photo interpretation obtained from various reconnaissance systems such as spy satellites and Unmanned Ariel Vehicles (UAV'S) are the most effective threat opposing these installations. Strategic and military installations such as headquarters, commanding posts, aircraft fortifications, air defence bases,...etc are the most important targets for the invading forces in any warfare to limit the military forces capabilities of any country. This paper spotlights the building visual reconnaissance and surveillance detection methods, particularly military buildings, also the opposing camouflage and concealment techniques that shield them, the matter that will assist designers in creating guidelines for camouflage effectiveness in the visible spectrum.