I have gone through the Normandy campaign as USA. When continuing on with the Operation Market Garden, I come in as the Germans. Is this correct? Is there any way to continue on as the USA? I don't seem to have a choice. Is this normal?
It's normal. The campaigns aren't exactly connected, but just different operations where the faction you play actually won. Invasion of Normandy is the US campaign, Operation Market Garden is the PE campaign (a fictional faction representing Waffen-SS and Wehrmacht units), and Caen for the British campaign. If you own Tales of Valor you'll find the Tiger Ace campaign is kinda a Wehrmacht campaign, but mostly show-cases the Tiger and the Direct Fire mode Relic introduced, as well as there's a US mini campaign and a Wehrmacht mini campaign.
Thanks for the reply Lethal. I will get on with it then. :)