What purpose does Chad Williams think Zuberi's poster serves?

highlight racial pride among African-American people.

Explanation:

Chad Williams think that Zuberi's poster is an artistic representation of African-American military service which serves as a growing sense of racial pride, racial consciousness and racial service in the military.

Though the poster looks quite artistic, Chad feels that the actual event was more grimmer and devastating than what is portrayed. Nevertheless, he believes that whole idea of the poster by the artist was to highlight racial pride among African-American people.

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation:

it should be a. song dynasty’s civil service examination system created an administrative bureaucracy manned by the landed aristocracy.