December 7, 1941
The US reaction was to counter attack. Commencing at Guadalcanal in 1942.
When did U.S. break Japanese code. I heard it was before the attack on Pearl Harbor. If this is so why was the attack a surprise.
The nearest attack by Japan on US mainland took place in Oregon state forest. This took place in 1942 and was the only attack on the mainland.
December 7th 1941
April 18th 1942
Japan has been at war already, but after they attack on Pearl Harbor, the US declared war on them the next day 1942
1942
The US didn't directly attack anybody. Japanese ships atacked a patrol, thus leading to the famous Battle at Midway.
By July 1942, the Japanese had already attacked the US and the war was already underway. Before the war began, the US had various war plans for the possibility of war with Japan. But none of these war plans included a US attack on Japan to start the war. All US plans assumed that the Japanese would start the war in one way or another, usually with a Japanese attack on the US forces on the Philippines. The US President had specifically told the US Army & US Navy leaders not to cause a war with Japan by accidental or intentional military action.
Philippines
planes
to attack japan.