The ghost army consisted of 82 officers and 1,023 enlisted men. With their eclectic mixture of talents, they were strictly in the deception business. The Special Troops were made up of four units: a sonic deception company, a special radio company, a company of combat engineers, and a battalion of camoufleurs. They served with four armies in five European countries in five major campaigns from D-Day (June 6, 1944) until the end of the war in 1945.
The Special Troops used six major methods of deception: camouflaging troops and tanks, placing dummy tanks and artillery, firing pyrotechnics to simulate actual artillery fire, the use of artificial sound effects, using artificial radio communication, and using fake special effects. This created an atmosphere of great danger as they needed to be in close to front line battles.