Question

When Lincoln issued his Emancipation Proclamation, he knew it did not have the power to end slavery. Why was he correct?

Answer 1

Lincoln Issues the Emancipation Proclamation

One month later, after the qualified Union victory in the Battle of Antietam, Lincoln issued a preliminary proclamation warning that in all states still in rebellion on January 1, 1863, he would declare their slaves “then, thenceforward, and forever free.”