While America remained neutral due to its own isolationism policy at the beginning of the First World War, public opinion changed over time. Namely, during the reporting of war events in Europe, the American public began to consider the Germans as the main aggressors. After the flooding of the passenger ship, and the entry of America into the war, war propaganda was launched in order to raise morale and achieve an acceptable public opinion on the justification of American participation in the war. Many reports of war, propaganda materials and post-war activities have contributed, among other things, to the American public creating distrust of German immigrants.