(A) the military career of Stonewall Jackson.
(B) ** the Confederate threat to the Union capital.
(C) the Civil War’s early string of Union victories.
(D) the Union threat to the Confederate capital.
EXPLANATIONS BELOW
Concept note-1: -Fought on September 17, 1862, Antietam was the bloodiest single-day battle in American history with over 23, 000 casualties (men listed as killed, wounded, captured or missing) in roughly 12 hours. The battle ended the Confederate invasion of Maryland in 1862 and resulted in a Union victory.
Concept note-2: -The Battle of Antietam ended the Confederate Army of Northern Virginia’s first invasion into the North and led Abraham Lincoln to issue the preliminary Emancipation Proclamation.
Concept note-3: -Most importantly, Union victory at Antietam provided President Abraham Lincoln the opportunity he had wanted to announce the Emancipation Proclamation, making the Battle of Antietam one of the key turning points of the American Civil War.