What was the significance of the battle at antietam creek?
a- this battle was a turning point of the war, showing britain and france that the confederates had the clear advantage.
b- after this battle, mcclellan was promoted by lincoln for pursuing lee’s beaten troops.
c- this was the site of the first ironclad ship battle.
d- the bloodiest single-day battle of the war, this attempt of lee's to invade the north was thwarted.