4. How did enslaved African Americans in the South help the Union in the war?

They helped because they had to pick the cotton for clothes and to sell to buy things from other people. They also helped by fighting with the people that were in the army already. They also worked on plantation farms to get the resources like food and wool. Please comment on this answer to tell me if it is wrong. I hope this is correct and it helps you! Have a great day!

1) union forces launched a surprise attack.

2) more confederate troops arrived by train.

3) union forces retreated.