Columbia subject headings:
Military missions.
Military policy--United States.
United Nations--Armed Forces.
United Nations--Peacekeeping forces.
United States--Military policy.
Harvard subject headings:
Military missions.
United Nations--Armed Forces.
United Nations--Peacekeeping forces.
United States--Military policy.
Princeton subject headings:
Military missions.
United Nations--Armed Forces.
United Nations--Peacekeeping forces.
United States--Military policy.