...ntrating D. H. Hill's and my own force behind the Antietam at Sharpsburg, where we could get together in season to make a strong defensive fight, and at the same time check McClellan's march towards Harper's Ferry , in case he thought to relieve the beleaguered garrison by that route, forcing him to first remove the obstacle on his flank. He preferred to make the stand at Turner's Pass, and ordered the troops...