How did the US know they were going to be attacked by Japan?
The United States had broken the secret code used to send messages between Tokyo and the Japanese embassy in Washington DC
The US stopped exporting steel, aviation fuel, and scrap iron to Japan. Japan got mad and allied with Germany and Italy and eventually Japan attacked the US. On the day of Dec. 7, 1941, diplomats from Japan were meeting with Congress in Washington to make peace with the US. Well, as that was going on, Japanese fighter planes attacked Pearl Harbor.
No of course not. However the Americans did find out that Japan was going to attack them, but they didn't know when and where. They found this out by cracking the Japanese code, that was being sent through. Japan wanted the attack on Pearl Harbor to be a surprise, so the US would not be prepared to defend themselves. This is why the U.S. lost many men, planes and ships when Japan bombed Pearl Harbor…