World War I Study Guide Vocabulary to Know censor infantry neutral bond propaganda Doughboy dissent alliance nationalism armistice Concepts to Know Why the war started in Europe Roles of women and African Americans in the war Details about why the United States joined the war What the United States needed to do to prepare for war What the Committee on Public Information (CPI) did Identify the alliances in the war How people in the U.S. helped on the home front How the U.S. changed because of World War I World War I Study Guide Vocabulary to Know censor infantry neutral bond dissent propaganda Doughboy nationalism Concepts to Know Why the war started in Europe Roles of women and African Americans in the war Details about why the United States joined the war What the United States needed to do to prepare for war What the Committee on Public Information (CPI) did Identify the alliances from the war How people in the U.S. helped on the home front How the U.S. changed because of World War I alliance armistice