World War I Propaganda The United States used propaganda to control what people thought and to create positive feelings towards World War I. The newspaper was used to release information that had sometimes been altered to glorify the war. Music and motion pictures were used to try to help the people understand why America was in the war and what was going on overseas. The Committee on Public Information was formed to educate the Americans about the war. Leaflets were distributed by planes over the German trenches causing them to loose morale and hope. All of these things were used to educate and sometimes mislead the people it reached. The newspaper was the main