Other contributors have said "Why US declare war with Japan?" is the same question as "Who declared war?". If you believe that these are not asking the same thing and should be answered differently, click here.
Who declared war?
Answer:
Japan, Germany declared war on the US, the US declared war on Japan/Germany.
Related answers: - Was the war in Iraq a declared war? No. The US has not participated in a declared war since WWII.
- When was war declared in the Vietnam war? WWII was America's last declared war.
- Who declared war in the war of 1812? The Americans declared war on the British.
- Was the gulf war a declared war? Hussian may have declared war on Iran during the Gulf War (1980-1988); see that website. As far...
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