The leaders of the two most powerful nations fighting in the Second World War, President Franklin D. Roosevelt and Adolf Hitler, never met. They never even spoke.

In this episode, we explore the war of words between them, the involvement of each of their allies and when it became certain that war would break out between their two nations.

Don is joined by Charlie Laderman, Senior Lecturer in International History at King's College London. Charlie is the author of 'Hitler's American Gamble: Pearl Harbor and the German March to Global War'.

Edited by Sophie Gee. Produced by Freddy Chick. Senior Producer is Charlotte Long.

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All music from Epidemic Sounds/All3 Media.

American History Hit is a History Hit podcast.