Yes it is true. During the American Civil War the African American soldiers who fought in the Union side we're still discriminated and treated as an inferior race of man. And even after the Union win the war, the African American we're given poor treatment in all fields like Education and social treatment.
Yes that was the purpose if the bill of rights
segrogation. "The 1920s was a decade of change, when many Americans owned cars, radios, and .... Yet segregation, or separation of the races, continued to be practiced in North ... Modern civil rights laws for minorities were still many years away."- NC Pedia
After the end of World War II it was the time of decline of European colonies which lead to the rise of new superpowers and emergence of several new countries on the map.
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Explanation:</u>
After WWII Europe was divided into USA captured Europe and USSR capture Europe. The end of the war increased the rate of decolonization. Independence being granted from great powers like India from United Kingdom, Indonesia from Netherland. The Philippines from The United States and several Arab nations get free from the superpowers.
This happened because the superpowers were badly affected by the war and they were not able to rule other nations anymore so they have to step back. Thus how the World War II led to the origin of independence and even the formation of so many new countries and nations.