Could Patriotism and propaganda posters be considered two different effects of US in WWI?

At first I thought sure, but than the posters did cause patriotism so...

3 answers

If there hadn't been a war, then there wouldn't have been these propaganda posters. So they must have been an effect of WWI.
So, Patriotism and propaganda posters can be considered different?
Yes. Propaganda posters are concrete and can be seen. Patriotism is a feeling and a spirit.