Answer:
Constantine I
Explanation:
I know this is probably late but in case someone else looks this up in the future.
McClellan discovered General Robert E. Lee's battle plan.
Obviously, infiltration and access to battle plans allow for the opponent to figure out what their opponent's plans are, thus giving McClellan the victory at Antietam.
Hope this helps!
6. Reform
They come together to change something
It shouldn't but sadly it still does in this day and age