Which change was needed for african american men throughout the united states to be able to vote in congressional elections? reconstruction had to end. the bill of rights had to be written. the voting rights act had to be passed. the fifteenth amendment had to be ratified.

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:

d. a week

hope this