Final answer:
The Battle of Antietam led Lincoln to declare the end of slavery in the South.
Step-by-step explanation:
The correct statement about the Battle of Antietam is that it led Lincoln to declare the end of slavery in the South.
The Battle of Antietam, which took place on September 17, 1862, was not a clear victory for the Northern states as the Confederate forces successfully retreated. However, it resulted in enough of a Union victory for President Lincoln to issue the Emancipation Proclamation, which declared the end of slavery in areas under Confederate control.
This proclamation was a significant turning point in the war as it shifted the war aims from simple union to Emancipation and ultimately led to the abolition of slavery in the United States.