2 African Americans have served in the Supreme Court
True.
And this is not only true for the distant and not so distant past, it's also true for the present as well. Slaves and prostitutes still exist around the world, despite us thinking that slavery may have been abolished. This is sadly not the case; in some areas in Africa and the Middle east, slavery still exists.
B. France believed Germany would not invade or attack their nation
In the early stages of the war, France and Germany were at a stalemate with hardly any action in the western front until the German blitzkrieg on May 10th, 1940 which caught allied forces off guard. The encirclement of British forces at Dunkirk and the fall of Paris led to the surrender of France.