United States declaration of war on Japan

The attack on Pearl Harbor took place before a declaration of war by Japan had been delivered to the United States. This attack caused more than 3,400 U.S. military casualties.^[2] It was originally stipulated that the attack should not commence until thirty minutes after Japan had informed the U.S. that it was withdrawing from further peace negotiations,^[3][4] but the attack began before theThe attack on Pearl Harbor took place before a declaration of war by Japan had been delivered to the United States. This attack caused more than 3,400 U.S. military casualties.^[2] It was originally stipulated that the attack should not commence until thirty minutes after Japan had informed the U.S. that it was withdrawing from further peace negotiations,^[3][4] but the attack began before the notice could be delivered.  notice could be delivered.