The person in question is Woodrow Wilson:
He was the president of the United States from 1913 to 1921, which means that he was the president before, during and after the First World War.
He was very active in the peace process after the war, including proposing the formation of the League of Nations.
Most of the scholars preached against the Mongol rule so the Mongols in power made sure that the scholars do not get high positions in the new government.
Truman's ordered the armed force to desegregate, or stop separating people based on race. He told the Justice Department to carry out any civil rights laws that were already in force. He want to protect African Americans better.
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