The document discusses the role of the U.S. during World War I. Initially, President Wilson proclaimed neutrality. However, Germany's unrestricted submarine warfare threatened U.S. trade and lives. The intercepted Zimmerman Telegram also increased tensions. In April 1917, Wilson asked Congress to declare war to "make the world safe for democracy." The U.S. mobilized troops and supplies to support the Allies, who were struggling by 1918. American involvement helped shift the war in favor of the Allies, and Germany surrendered in November 1918.