Britain and France declared war after Germany invaded in 1939.
On one side of the war were the
Powers, which included Germany, Italy, and Japan.
The
on the other side included Britain and France.
To avoid involvement in the war, the United States pursued a policy of

1: Belgium, Denmark, and Poland
2: Appeasement, Allies, and Axis
3: same as 2
4: Fascism, Isolationism, Militarism