Final answer:
In World War II, African-Americans did not fight in integrated combat units. They served in segregated units and made significant contributions. They also led social movements like the 'Double V' campaign and formed rights organizations.
Step-by-step explanation:
During World War II, African-Americans played significant roles, but they did not fight in integrated combat units. Although they served in the military, like the Army Air Corps, they were typically segregated. They did indeed rally behind the 'Double V' slogan, which represented victory over dictators abroad and racism at home. There was also a notable demographic shift as many African-Americans moved north and west in large numbers to seek better economic opportunities, which is recognized as the Great Migration. The Congress of Racial Equality was also formed during this time, as a civil rights organization advocating for equality through nonviolent resistance.
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