The Union Commander in this battle was George B. McClellan and the Confederate Commander was Robert E. Lee. Neither the Union nor the Confederate won this war, but it was a Union strategic victory.
General Lee.
The Union decided to engage into battle first with the Confederate. General George B. McClellan had a great plan in battle, but the plan was poorly executed. The Union decided to fight from North to South trying to get the Confederate away from Pennsylvania, which is what the Confederate was to invade.
The Confederate and the Union fought all morning, all day, and all evening to try and win the battle.
Union Flag