What jobs did black soldiers have during the civil war?

In regiments from several states, blacks fought alongside whites in the same units.

However, most black combat soldiers were organized into units designated 'N' or 'C' (Negro or Colored). All the enlisted men were black and nearly all of the officers were white.

Before the creation of those special all-black units, many regiments used black soldiers for support duties such as cooking, tending mules, and driving wagons.

By the end of the war nearly 10% of the Union Army was black.