Yeah the word propaganda used to just mean dissemination of knowledge or information, it only got the negative connotation associated with it after WWI I think. Americans wanted to stay out of the war (WWI), they did not want to involve themselves in foreign wars (imagine if they were still like that). The American government employed a guy called Edward Bernays (the nephew of Sigmund Freud) to use Propaganda to make Americans feel that joining the European war was a good thing. He obviously succeeded and many Americans lost their lives.