Answer:
Ulysses S. Grant, William T Sherman, and Robert E Lee.
Explanation:
Ulysses S Grant was commander of all Union forces after President Lincoln fired George B McCllelan in 1862. He would help lead the Union to victory against the Confederacy.
William T Sherman was a military commander in the Union army. His famous military campaign through the state of Georgia, also known as Sherman's March to the Sea, decimated the Confederacy's will and ability to continue fighting.
Robert E Lee was the commander of all Confederate forces throughout the Civil War.
