An Argument for Strong Propaganda for American Entry into World War I. This paper will seek to understand the methods of propaganda for public opinion during World War I, and seek to understand why they were affective. By presenting some of this evidence, we can learn why trade, and political treaties were the main validation for the American entry into this war. Pages: 2 Bibliography: 0 source(s) listed Filename: 17989 Strong Propaganda War.doc Price: 17.90