What major achievement for african americans took place soon after world war ii

Desegregation of the military.

Explanation:

On July 26th, 1948, President Truman ordered to desegregate the armed forces. It was the Executive Order 9981 which stated that all kind of racist treatment must be abolished and that all people in the armed forces should be treated with equality of opportunities no matter the race, religion or origin.

It was a major achievemt for African-American.

answer; the automatic system because it is a "gut reactor"  

answer; language that can promote racial stereotypes;