Columbia subject headings:
Antietam, Battle of, Md., 1862--Congresses.
Maryland Campaign, 1862--Congresses.
Harvard subject headings:
Antietam, Battle of, Md., 1862--Congresses.
Maryland Campaign, 1862--Congresses.
Princeton subject headings:
Antietam, Battle of, Md., 1862--Congresses.
Maryland Campaign, 1862--Congresses.