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Welcome to Journey Through Time. I'm Sarah Churchwell. And I'm David Ulyshoga.

And this is the first of our new five-part series about a critical

moment in the Second World War. Now, some of the story we're about to tell is pretty well known,

the fact that between 1942 and 1945, about 1.5 million Americans, mostly service personnel in the

American military, passed through Great Britain. They lived here,

they trained across the country, they got to know British people. Most of them ended up in Europe

after D-Day. That was what they were on route to. But there were American military personnel

stationed in Britain right through to the end of the war. And as we said, that part is pretty

familiar. But it means

things like you've got, if you start picturing it, you've got American jazz playing in little

English towns and in the countryside. You've got the famous story about the GI Brides, right? So the

70,000 British women who married American soldiers that they met here during the war. So it was an

extraordinary moment, right? So Britain at that time is 47 million people, and it's suddenly hosting

...