084 Before the Attack on Pearl Harbor - One Minute History

The transcript outlines the events leading up to the attack on Pearl Harbor. It begins with Japan's invasion of China and the US response, which includes trade sanctions. Enraged by these actions, Emperor Hirohito approves a plan for the attack on Pearl Harbor. Diplomatic efforts fail as President Roosevelt learns of Japan's war plans. Despite a final proposal from the US demanding Japan's withdrawal, the attack on Pearl Harbor is already underway.

What was the significance of the proposals dropped by Ambassador Nomura?

How did American officials become aware of Japan's war plans?