Columbia subject headings:
Military planning--United States--History--20th century.
Panama--History--American Invasion, 1989--Chronology.
United States--History, Military.
Harvard subject headings:
Military planning--United States--History--20th century.
Panama--History--American Invasion, 1989--Chronology.
United States--History, Military.
Princeton subject headings:
Military planning--United States--History--20th century.
Panama--History--American Invasion, 1989--Chronology.
United States--History, Military.