According to Roosevelt advisers the war was what

FDR and World War II

After leading the United States through nearly a decade of Depression, President Franklin Delano Roosevelt took on the role of Commander-in-Chief when the United States entered the Second World War.

For the United States, the Second World War was simultaneously fought in two theaters of military combat, in Europe and in the Pacific, a war involving sixteen million American men mobilized into the armed forces-405,000 of whom lost their lives.