The United States underwent significant changes as a result of the war. The economy shifted toward military production. Because of a labor shortage, many African-Americans and women were hired to make weapons. Women became streetcar conductors, railroad workers, shipbuilders, and sold war bonds. The suffragette movement led to the ratification of the 19 th amendment in 1920, granting women the right to vote.
German subs sink a British passenger liner, the Lusitania.
German subs sink US ships. US declares war on Germany. Wilson proposes League of Nations in Fourteen Points. Military conflict ends. The league existed from 1920-1946.