Columbia subject headings:
Fortification--New York (State)
Historic sites--New York (State)
New York (State)--History--Revolution, 1775-1783.
Harvard subject headings:
Fortification--New York (State)
Historic sites--New York (State)
New York (State)--History--Revolution, 1775-1783.
Princeton subject headings:
Fortification--New York (State)
Historic sites--New York (State)
New York (State)--History--Revolution, 1775-1783.