Answer:
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
I don’t have an answer but I see that the other guy who answered answered on 2 of my questions. He said the Same thing on both of mine which happens to be the same as yours.
the answer is 2 to let you know hope you get it right bro
