reply to post by Animal
Our Japanese oil embargo, our seizure of all Japanese assets, and the fact that we were supplying the Allies with money, weapons, and supplies.
Mainly the oil embargo.
The War Powers Act of 1973 (Pub.L. 93-148), also referred to as the War Powers Resolution, is a resolution of the Congress of The United States of America that stated that the President of The United States of America can send troops into action abroad only by authorization of Congress or if the United States of America is already under attack or serious threat. The War Powers Act requires that the president notify Congress within 48 hours of committing troops to military action and forbids troops from remaining for more than 60 days without an authorization of force or a declaration of war.