Before the attack on Pearl Harbor, the 800,000-member America First Committee vehemently opposed any American intervention in the European conflict, even as America sold military aid to Britain and the Soviet Union through the Lend-Lease program. Opposition to war in the U.S. vanished after the attack. On 8 December, the United States, the United Kingdom, Canada, and the Netherlands declared war on Japan, followed by China and Australia the next day. Four days after Pearl Harbor, Nazi Germany and Fascist Italy declared war on the United States, drawing the country into a two-theater war. This is widely agreed to be a grand strategic blunder, as it abrogated the benefit Germany gained by Japan's distraction of the U.S. (predicted months before in a memo by Commander Arthur McCollum)[nb 12] and the reduction in aid to Britain, which both Congress and Hitler had managed to avoid during over a year of mutual provocation, which would otherwise have resulted.
What program allowed America to sell military supplies to Britain and the Soviet Union? On what day did the U.S. and its allies declar war on Japan? How long after the Pearl Harbor attacks did Germany and Italy declare war? Was Germany's declaration of war with the U.S. considered to be sound strategy? how many members did the America First Committee have? What group was opposed to American involvement in the war in Europe? When did the United States declare war on Japan? How many days after the attack on Pearl Harbor did Germany wait to declare war on the United States? Who predicted Germany's declaration of war against the United States months before?