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1917
The Espionage and Sedition Acts made it a crime to interfere with the operations of the military to promote the success of its enemies and prohibited many forms of speech perceived as disloyal to the United States of America. -
1919
The most important of the peace treaties that brought World War I to an end. The Treaty ended the state of war between Germany and the Allied Powers. -
1920
The Ku Klux Klan (Knights of the Invisible Empire) grew in the early 1920s out of the growing intolerance and prejudice of the American public. It was most popular in the Midwest and the South. The Klan was anti-foreign, anti-Catholic, anti-black, anti-Jewish, etc. It was pro-Anglo-Saxon, pro-"native" American, and pro-Protestant. It fell apart in the late 1920s -
1922
The Five-Power Naval Treaty of 1922 limited the construction of certain types of large naval ships, and it applied ratio limits to the number of ships a country could build. Submarines and destroyers were not restricted. It also stated that the British and Americans would refrain from fortifying their Far Eastern possessions, including the Philippines. The Japanese were not subjected to such restraints in their possessions. -
1924
The Immigration Act of 1924 replaced the Quota Act of 1921, cutting quotas for foreigners from 3% to 2%. Japanese were banned from coming to America. Canadians and Latin Americans were exempt from the act, because their close proximity made it easy to attract them when they were needed and it was easy to send them home when they were not needed. The Immigration Act of 1924 ended the era of unrestricted immigration to the United States. -
1924
the Dawes Plan of 1924 addressed the debt repayment issue. It set up German reparations and allowed for Americans to make private loans to Germany. The Germans used these loans to pay the reparations, which the Allies used to pay the war debts to the Americans.