Columbia subject headings:
Harvard subject headings:
Gettysburg Campaign, 1863.
United States--History--Civil War, 1861-1865--Campaigns.
Virginia--History--Civil War, 1861-1865--Campaigns.
Princeton subject headings:
Gettysburg Campaign, 1863.
United States--History--Civil War, 1861-1865--Campaigns.
Virginia--History--Civil War, 1861-1865--Campaigns.