American indignation over the sinking led to U.S. entry into WWI against Germany in 1917. Troops did not officially participate in battle until after the United States declared war in 1917. Jones Act restates U.S. intention to grant independence to the Philippine Islands once a stable government is formed. April 4, 1917. President Wilson calls a special session of Congress to declare war on Germany.
Brazil declares war on Germany.
The Russian Revolution is successful in overthrowing the Czar and instituting a Communist state. Canadian women are granted the right to vote. I ends on November 11th. July 10, 1919. The Treaty of Versailles, including the League of Nations covenant, is sent to the United States for ratification.