Question

Which battle of the civil war forced a confederate retreat from maryland in september of 1862 and resulted in the highest number of casualties for a single day in american military history?.

Answer 1

Battle of Antietam

Step-by-step explanation:

Beginning early on the morning of September 17, 1862, Confederate and Union troops in the Civil War clash near Maryland's Antietam Creek in the bloodiest single day in American military history.