When is Propaganda used?

Whenever one side needs to convince another side of an opinion or viewpoint by using elements other than facts. Essentially, all the time. Examples are using the stars and stripes, making HUGE promises, saying what we need to do but never claiming to do it, getting celebrities to talk for you, etc. Nazi Germany is good to look at for Propaganda, as well as the United States, especially presidential campaigns. No offense, but Obama used a ton of propaganda in 2008.