How did the united states government promote patriotism and suppress perceived subversion apush?

For the answer to the question above, I think one of the things that united

states government promote patriotism is by putting flags on every establishment or structure that they are occupying. They also promote patriotism like in the movies Transformers. They always show the flag of the US and implant them in the mind of the viewer subconsciously that they must be proud of their race and they are able to take down any alien extraterrestrial invaders