Hull Note — U.S. Ultimatum Pushes Japan Toward Pearl Harbor
Secretary of State Cordell Hull delivered a note demanding Japan withdraw from China and Indochina as the price for normalized U.S.-Japan relations. The Japanese task force was already at sea heading for Pearl Harbor when the note was delivered.
The Hull Note convinced the Japanese that diplomacy was finished and there was no turning back — though the attack fleet had already been dispatched, meaning war was already decided.
Outcome
Japan proceeds with Pearl Harbor attack; WWII in Pacific begins