An initial assault led by the 79th New York "Cameron Highlanders" succeeded against Jones's outnumbered division, which was pushed back past Cemetery Hill and to within 200 yards (200 m) of Sharpsburg.
Et indledende angreb blev anført af 79th New York "Cameron Highlanders" og lykkedes mod Jones' talmæssigt underlegne division, som blev presset tilbage forbi Cemetery Hill og til 200 meter fra Sharpsburg.