Their land was taken over, as was their food source, making it hard for them to survive. They did not have the same rights as Americans either until 1924. They were forced to live on reservations.
Even though slavery was abolished, that did not mean the white people would stop treating the black people with a lack of respect. Thus lead to segregation some years later, and then resulted in the civil right movement.
Answer:
it says on a website "he denounced the attack and asked congress for a declaration of war on Japan"