From: A Business Insider Article by Jeremy Bender

From the summer of 1944 until the end of the World War II in Europe, the US fielded a unique 'Ghost Army' throughout France and the Rhine Valley in order to deceive the Third Reich into over estimating the strength of the Allied forces.

 The Ghost Army, which consisted of 1,100 handpicked men and a number of phony inflatable tanks and weapons, was part of the 23rd Headquarters Special Troops.

The unit's sole responsibility was to create illusions and spread disinformation about the strength and location of Allied forces. Read More