When the first American servicemen arrived in England in March 1942, the indigenous population greeted their presence with mixed feelings. A certain level of resentment of these newcomers was harboured by the English and expressed by many in the well-worn phrase of the time 'over-paid, over-sexed and over here'. But without the presence of American servicemen in Britain and its huge military and industrial muscle, the war with Germany would probably have been lost. Using a combination of contemporary eyewitness and documentary sources plus latter-day interviews, linked together by engaging narrative, author Helen Millgate takes a look at the background to 'the friendly invasion' - where they all came from, who they were, where they were stationed and what they did. She examines how the 'Yanks' got on with the locals, how they fitted in (or didn't), their impact on the social structure of England in the 1940s, the problems they brought with them and their impressions of England. She also reviews how the US Army went to war in June 1944 with the arrival of D-Day, and beyond to VE-Day. She concludes with the journey home once the war in Europe had ended, describing what the Yanks left behind them and the wives and sweethearts they took 'stateside'.