Wasn't Tenpenny english? From the indications on the wiki developers have said they've deliberately left the fate of the rest of the world blank so we could have fun with it but there is a quote on the wiki from a dev saying "Allistair Tenpenny came to the Capital Wasteland from Great Britain to seek his fortune, so that alone tells you that the U.K. was also hit in the war. And if he came to U.S. to succeed, that says a lot about how screwed up Europe must be. So we just allude, a little bit, to the state of the rest of the world. We like to leave a lot to the players' imaginations, and somebody like Tenpenny serves as a catalyst for those thoughts." - Emil Pagliarulo. Plus if you think about it, with the focus on nuclear power/weapons in america and no real indication that treaties were signed to keep nukes restricted that nearly everywhere had their own supply, plus that the EC (fallout's more powerful and unified EU) and the arab nations had a 'limited' nuclear exchange before the great war, whatever limited means, and that tel aviv (the israeli capital) was hit by a terrorist nuke. That leads me to think there were nukes everywhere and from then on its really how you think countries would react to seeing the two most powerful countries nuking each other, and possibly others too as im not sure the anti-communist USA wouldnt want to take the other commies down too, do they nuke their enemies or hope that no one hits them? But from the fallout games so far it seems fair to say that no country has survived to be powerful enough or willing to take over areas formerly owned and part of america so makes me think they were all hit to some degree and are all too concerned with their own internal problems to be messing around elsewhere.