We declared war first on Japan after Pearl Harbour and
because they were allied with Germany we were automatically
at war with Germnany -- later declarations were just
perfunctory rituals.
I freely, openly, and confidently challenge anyone to find a single-JUST ONE-speech from Saddam Hussein where he didn't clearly describe that a state of war existed between the US and Iraq from 1991-2003 (c'mon, it's only something the man raved about every day-several times a day-for TWELVE YEARS!).
Not true -- Soviet Russia was not at war with Japan until the day after Hiroshima. We were not at war with Germany until Hitler's declaration.