(A) ** It was a Union victory and prompted Lincoln to publicly announce his Emancipation Proclamation.
(B) It marked Robert E. Lee’s successful invasion of the North.
(C) It resulted in a tremendous loss of life for both the Union and the Confederacy.
(D) It was the first battle in which African American soldiers served.
EXPLANATIONS BELOW
Concept note-1: -The Union victory at Antietam would prove decisive, as it halted the Confederate advance in Maryland and forced Lee to retreat into Virginia.
Concept note-2: -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.
Concept note-3: -Why was the battle of Antietam the turning point of the war? Because it was the first Union victory and set the stage for Lincoln to present his emancipation proclamation.
Concept note-4: -1. Antietam enabled the Union to repel the first Confederate invasion of the North. A tide of momentum swept Robert E. Lee’s Army of Northern Virginia-fresh from a successful summer campaign and victory at the Second Battle of Bull Run-onto Union soil for the first time on September 3, 1862.