Columbia subject headings:
Combat--Congresses.
Military art and science--History--20th century--Congresses.
Tactics--Congresses.
Harvard subject headings:
Combat--Congresses.
Military art and science--History--20th century--Congresses.
Tactics--Congresses.
Princeton subject headings:
Combat--Congresses.
Military art and science--History--20th century--Congresses.
Tactics--Congresses.