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Subject
- World War, 1939-1945337
- World War (1939-1945)319
- History108
- Underground movements, War37
- Underground movements36
- Holocaust, Jewish (1939-1945)35
- Secret service33
- Campaigns28
- Military campaigns28
- World War22
- Concentration camps21
- Jews18
- American13
- Cryptography13
- Atrocities12
- Military operations, Aerial12
- Holocaust survivors11
- Escapes10
- Guerrillas10
- Intelligence officers10