Columbia subject headings:
Europe--Defenses.
Military service, Voluntary--United States.
North Atlantic Treaty Organization--United States.
United States--Armed Forces.
United States--Military policy.
Harvard subject headings:
Europe--Defenses.
Military service, Voluntary--United States
North Atlantic Treaty Organization--United States.
United States--Armed Forces.
United States--Military policy.
Princeton subject headings:
Europe--Defenses.
Military service, Voluntary--United States.
North Atlantic Treaty Organization--United States.
United States--Armed Forces.
United States--Military policy.