...attacking force would be invisible until they arrived on the top of the crest opposite, and in pistol-shot distance, or what we call point blank musketry range. On our front about a mile away was Antietam creek , spanned by a bridge. This was guarded by Toombs's Georgia brigade, which was only a skeleton command, being about one-fifth of its full ranks. Our army surrounded Sharpsburg in a semi-circle, ...