The Ghost Army of WWII: A Secretive Military Unit
https://onlinemilitaryeducation.org/blog/336-the-ghost-army-wwii.html
The Ghost Army was a tactical deception unit that was formed during WWII. Its primary purpose was to mislead the enemy about the size, strength, and location of American troops. The unit consisted of 1,100 men, mostly artists, designers, and engineers who used their creative talents to design and create fake military equipment, vehicles, and structures. They used various methods ...
such as inflatable tanks, fake radio broadcasts, and sound effects to deceive the enemy into thinking that the Allies had more troops and equipment than they did.
might need to revive it in a different context