Interesting perspective. There was very little practical significance to Germany declaring war first. The only functional change was that they could operate without restriction in the Atlantic, but the Kriegsmarine was unaware of either Japan's or Hitler's intentions. It took a month to get just five U-boats on the way to American waters and it would have been little different in the case of say an American declaration of war in February. Can anyone suggest any disadvantage to the Germans if the United States was the one to declare war? There was no Barbarossa- or Pearl Harbor-type surprise attack that we could launch. And even with the preference for "Germany first", actual hostilities in the Pacific would continue to draw forces away from preparation for something that would probably happen sometime in the Atlantic-European theater. The worst case for Germany would be Roosevelt asking for and getting a declaration of war in the days immediately following Pearl Harbor, making the case that Japan's actions were emboldened by and linked to her allies' war in Europe (ironically the Tripartite Pact might benefit FDR's argument more than the Fuhrer's). Let's say they're all at war as of Dec 11 - what would be the harm, other than to Hitler's ego?