1921-1941 By akgreen 1040 Selective Service Act 1921 Harding Became President 1924 Indian Reorganization Act 1927 The Jazz Singer 1929 Immigration Act 1929 Hoover Becomes President 1929 Great Depression Begins 1932 Bonus Army March 1932 Amelia Earhart Flies Across Atlantic 1932 20th Amendment 1933 Agricultural Adjustment Act 1933 Civil Works Administration 1933 21st Amendment 1933 Japan and Germany Withdraw from League of Nations 1934 Federal Housing Administration 1939 World War II Begins 1941 Attack on Pearl Harbor 1941 U.S Enters World War II