Back then , African American citizen were heavily discriminated by society.
For example, they did not allowed to enter the 'white folks' ' Restaurants. They don't even allowed to enter a same public restrooms as them.
They also doesn't count as citizen and not allowed to vote.
For the second question the one that is incorrect is Choctaw
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the U.S. had withdrawn all its troops, the fighting in Vietnam. South Vietnam officially surrendered to North Vietnam on April 30, 1975.
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revolution is the movement of an object around of center or another object ,forceful overthrow of government by people or any sudden or grand change.
Sephardic Jews are the Jews of Spain, Portugal, North Africa and the Middle East and their descendants. The adjective "Sephardic" and corresponding nouns Sephardi (singular) and Sephardim (plural) are derived from the Hebrew word "Sepharad," which refers to Spain.