Columbia subject headings:
Europe, Central--History, Military.
Europe, Central--History.
Europe, Eastern--History, Military.
Europe, Eastern--History.
Harvard subject headings:
Europe, Central--Armed Forces--History--Congresses.
Europe, Central--History--Congresses.
Europe, Eastern--Armed Forces--History--Congresses.
Europe, Eastern--History--Congresses.
Princeton subject headings:
Europe, Central--Armed Forces--History--Congresses.
Europe, Central--History--Congresses.
Europe, Eastern--Armed Forces--History--Congresses.
Europe, Eastern--History--Congresses.