9. Germany Did Not Declare War On The United States
During World War II, one of Nazi Germany’s huge mistakes was declaring war on the United States. If Germany had exercised caution in this regard, there is a chance that the US would not have formally declared war on Germany.
Even if the US had eventually done so, it would have been much later and the Germans would have bought themselves adequate time to confront their enemy. Several historians agree that although Germany and the US were unofficially at war, the Americans may not have wanted to fully commit to the European theater of the war if Germany didn’t expressly declare war on the US.
For the same reason, Operation Torch, the Allied invasion of North Africa (which was under Axis control), might have proceeded with minimal American participation. This would have bought the Germans more time and possibly turned things around for the Nazis.