Decoys and deception were extremely important already in WW2. Since it was almost impossible to stop the bombers from getting through the next best thing was to make them bomb the wrong target, preferably a fake one. Another way was to have the enemy guess wrong and divert fighter units to the wrong place. This was done in all theatres of war. The Q-sites in England, the "Scheinanlages" in Germany an even a lot in the US. I have made a video: Fake targets - Bomber decoys and deception with some lesser known facts that I hope you will enjoy! And you will probably teach me something new...: