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I believe the answer would be D. The Union victory at the Battle of Antietam
Lincoln issued the Emancipation Proclamation in response to the Union's Victory at the Battle of Antietam.
- The Emancipation Proclamation declared, "all persons held as slaves within any States, or designated part of the State, the people whereof shall be in rebellion against the United States, shall be then, thenceforward, and forever free."
- Slaves were employed by the Southern governments to assist their forces on the battlefield and to run the civilian front so that more soldiers could go to war.
- President Abraham Lincoln cleverly framed the Emancipation Proclamation as a necessary war measure to hinder the Confederacy's use of slaves in the war line, demonstrating his political genius.
- The Proclamation would be enacted under Lincoln's authority as Commander-in-Chief, and the slaves' freedom would be preserved by the "Executive government of the United States."
Learn more about the Emancipation Proclamation, refer to:-
https://brainly.com/question/7808570
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