The Chosen Ones

More than in the WW2, I think they were much more important in WW1's result.

That said...

USA just a minor part of the war in Europe. Russians would've won anyway.

I have to disagree pretty much all of your answer, Aero .

Firstly, Russia was still not THAT strong, the problem is that it's something near impossible to go through Russia without dying in the way because of the cold(and they had a very good strategy) . If Russia were actually attacking the Nazi people, it would have another result.

Secondly, without USA, the Japan would dominate the war in that area and, let's not forget, Japan was so strong that it actually could annoy USA. The Hiroshima Rose is the result . Japan was almost 100% focused on the USA, so without the USA, Japan would help Germany in Europe. And THAT would be OP.

So, I don't know if the Nazi would succed, but it would have a very good chance to.