The committee on public information (cpi) flooded the country with prowar propaganda, describing the germany as a nation of barbaric Huns.
The idea of the World War II propaganda was to create hype in the country and declare the whole nation of Germany as evil, uncivilized and extremely cruel and barbaric.
This was done to increase the support of the local population for the intervention of the United States in the Second World War.
The Propaganda helped to increase the morale of the whole country by pitting 'us vs them'
It was shown as the moral duty of the whole nation to confront an evil which will take over Europe and the world.