The Road to World War II

Why did the United States go from a policy of neutrality to joining World War II?

Actions in Europe & the Pacific

1922
1924
1933
1935
1936
1938
1938
1938
1939
1939
1939
1939
1939
1940
1940
1940
1941
1942

American Response

1928
1933
1934 - 1936
1935
1939
1939
1940
1941
1941
1941
December 7, 1941