Germany was far from the only offensive.
We (admittedly as far as I know, but I've seen little to suggest otherwise) pretty much single-handedly put Japan out of the war with the Atomic Bomb (whether our method was right or wrong is irrelevant to this discussion).
We turned the tide in many ways in Europe. While Allied forces were fighting valiantly, and were quite successful. I do not think WWII would have been won if the Americans had not stepped in.
We (admittedly as far as I know, but I've seen little to suggest otherwise) pretty much single-handedly put Japan out of the war with the Atomic Bomb (whether our method was right or wrong is irrelevant to this discussion).
We turned the tide in many ways in Europe. While Allied forces were fighting valiantly, and were quite successful. I do not think WWII would have been won if the Americans had not stepped in.