What did the propoganda posters of world war 1 say?

Some people during the war thought that the Propaganda posters were a good thing and that it was good that all the bad news wasn't getting around. Also, in the case of Hitler and Mussolini, they respected them and supported their choices. Now, on the other hand, other people thought that they should be able to know what is going on in their country and in the case of Hitler and Mussolini, they didn't like what they were doing to their country and didn't support them at all.
Germany.