Sorry to disappoint you Walter, but you are wrong again.
Meaconing was used in
WWII ie before Vietnam.
Meaconing (Coined from the term ‘Masking Beacon’) was developed by the Post Office and was a system of denying Direction Finding (DF) bearings to enemy aircraft. Briefly this was achieved by picking up the signals from German aircraft calling their DF stations for a ‘fix’, passing the signals to a transmitter and then re-radiating them. Special aerial arrangements and phasing equipment was used at our receiving sites to eliminate the local transmitter signal and leave only the aircraft signal in control. The bearing was of course destroyed by the double signal received by the DF station, and being on exactly the same frequency the German receiving station was unaware of the deception.