During World War I, Moton traveled to Europe on behalf of president Woodrow Wilson. His duty was to investigate the condition of the African-American soldiers. He often witnessed discriminatory practices. For example, during his investigation, Moton was confronted by an American general regarding twenty-six alleged cases of rape by black soldiers. The general told Moton that black soldiers were dangerous to themselves and women. Moton challenged these allegations, suggesting discrimination was motivating factor, and encouraged black soldiers to protest against segregation when they returned to the US.