<Li> A civil war had started in Siberia . </Li> <P> The decision to declare war on the United States allowed the United States to enter the European war in support of the United Kingdom and the Soviet Union without much public opposition . </P> <P> Even as early as mid-March 1941, President Roosevelt was quite acutely aware of Hitler's hostility towards the United States, and the destructive potential it presented, in reference to Hitler's statement of a "new order in Europe" during the Führer's own Berlin Sportpalast speech of January 30, 1941, the eighth anniversary of the Nazis' Machtergreifung: </P> <P>... Nazi forces are not seeking mere modifications in colonial maps or in minor European boundaries . They openly seek the destruction of all elective systems of government on every continent, including our own . They seek to establish systems of government based on the regimentation of all human beings by a handful of individual rulers who seize power by force . </P>

What effect did the japanese attack on pearl harbor have on the us