how did African participation in the Great War alter African expectations about their future?

When the war ended on November 11, 1918, African Americans anxiously and optimistically hoped that their patriotic sacrifices would have a positive impact on race relations and expand the boundaries of civil rights. Political leaders attempted to exert influence on the Versailles peace proceedings. W. E. B. Du Bois organized a Pan-African Congress, held in Paris from February 19 to 21, 1919, which challenged the legitimacy of European colonialism. (Just use the important parts)