Or an American invasion map. The UK and Russia both lost to the axis powers. While fighting some smaller battles in Africa and the middle east, they now focus on taking over the Americas. With the only ally to be Argentina on the Americas mainland, they now face a coalition of the remaining American powers with the United States, Canada and Brazil as the most important ones.
A what if the Americans stayed out of the war, and the axis won scenario.
I like it.
It can even include a tech race for the bomb.
Sounds like Fortress America in 1940s