African-American who fight for the union during the Civil War

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Explanation:

In early 1861, General Butler was the first known Union commander to use black contrabands, in a non-combatant role, to do the physical labor duties, after he refused to return escaped slaves, at Fort Monroe, Virginia, who came to him for asylum from their masters, who sought to capture and reenslave them.

i think that the answer is polishing peanuts

he came up or eelped come up with the jersy plan