England’s evacuation of Dunkirk happened 18 months before Japan’s attack on Pearl Harbor, 80 years ago. The Day of Infamy made it official, that there was a second World War. BBC Radio has a collection of World War II audio essays. This is the Dunkirk installment.
Here is the home page for the complete series.
https://www.bbc.co.uk/programmes/p02prmgr