The “friendly invasion” of Britain by over a million American G.I.s bewitched a generation of young women deprived of male company during the Second World War. The G.I.s easily conquered their hearts, leaving British boys fighting abroad green with envy. But for girls like Sylvia, Margaret, Gwendolyn and even the skeptical Rae, American soldiers offered an escape route from Blitz-ravaged Britain, an opportunity for a new life in affluent, modern America.