Battle of the Bulge? Thats when the Germans attack at the weakest point manned by Americans. The British attacked the Germans around the north of the bulge and helped stop the advance.
The war in the west was trivial compaired to that in the east. Number of Soviets/allies kia/captured in the east 20Million. Germany kia/captured 15million
USA deaths 418K, UK 450K in all theatres. The total number of Germanys facing the 1944 landings was 400K. 90% of the Axis armies were fighting Russia.
As I said, the US and UK contributions were comparatively trivial. The US didn't volunteer to fight either Germany or Japan. Both declared war on the US and attacked it.
Yes, the USA only got involved when the USSR rolled into Berlin. Idiot!
As Russia would have defeated Germany without help of the US, in May 1945 Russia could have simply driven from Berlin to Paris and installed communism throughout Europe, putting allied troops there prevented that. Stalin would have all Germany's technology. Such as the V2. So no space technology for the USA. Whether even Russia could of invaded Britain is debatable. Th 1940 plans for operation Sealion would have resulted in the destruction of the German invasion force.
The USA involvement was not an altruistic sacrifice, it made a considerable profit out of it. and protected its self from eventual defeat by the commiunists.