Columbia subject headings:
Harvard subject headings:
Guerrillas--United States--History--19th century.
United States--History--Civil War, 1861-1865--Commando operations.
United States--History--Civil War, 1861-1865--Scouts and scouting.
United States--History--Civil War, 1861-1865--Secret service.
Princeton subject headings:
Guerrillas--United States--History--19th century.
United States--History--Civil War, 1861-1865--Commando operations.
United States--History--Civil War, 1861-1865--Scouts and scouting.
United States--History--Civil War, 1861-1865--Secret service.