Subject
- Soldiers23
- Foreign relations21
- Aeronautics, Military19
- Military readiness18
- History, Modern17
- Vietnam War, 1961-197516
- World War (1914-1918)16
- Diplomatic relations15
- World War (1939-1945)15
- International relations13
- Military biography13
- Napoleonic Wars, 1800-181513
- Revolutions12
- War and society12
- Sociology, Military11
- Airplanes, Military10
- Armies10
- Antiquities9
- Biography9
- Colonies9