[tom8517]

I'm not at all sure it's a German slam dunk with out the Americans. In December '41 the western desert and the battle of the Atlantic were at a stalemate, the Germans were stalled in front of Moscow, all with out American involvement, aside from the material aid.

The wild card would have been the Japanese. Stalin being able to pull his Siberian divisions west had as much to do with stopping the German's as the weather. If the Japanese invaded Siberia, the Russians could have been in for a very bad time.

I don't think the invasion of Britain would ever have been feasible, the Germans just didn't have the naval power to match the Royal navy.

As for steamrolling Ireland, ask the British how occupying powers do there. They were there for 800 years and never pacified the Irish.