The Situation: After several attempts have been repulsed, additional elements of Gen Burnside's IX Corps prepare to assault the Rohrbach Bridge at about midday on 17 September ...
[Confederate]
20th Georgia Infantry
2nd Georgia Infantry
50th Georgia Infantry
Washington (LA) Artillery, 2nd Company
Wise (VA) Artillery
Source: The Antietam Battlefield Board.1
1 The battlefield position studies by the Antietam Battlefield Board (1904, 1908) are described in the Atlas, and are available online from the Library of Congress.
Carman, Ezra Ayres, and Lieut. Col. Emmor B. Cope, Hays W. Mattern, Charles H. Ourand, Atlas of the Battlefield of Antietam, 14 maps, Washington DC: US Government Printing Office, 1908 [AotW citation 16900]