Subject
World War, 1939-1945 Secret service
World War, 1939-1945
10
History
9
World War, 1939-1945 Cryptography
7
Spies
4
World War, 1939-1945 Underground movements
4
Atomic bomb
2
Atomic bomb History
2
Cold War
2
Espionage, German History
2
Germany History
2
Intelligence officers
2
Intelligence service
2
Intelligence service History
2
Secret service
2
United States Relations
2
Women spies
2
World War, 1939-1945 Diplomatic history
2
World War, 1939-1945 Electronic intelligence
2
World War, 1939-1945 Military intelligence
2
Abandoned children
1
Arms race
1
Asian American spies History
1
Bletchley (Buckinghamshire, England) History
1
Bletchley Park (Milton Keynes, England) History
1
Brazil History
1
Congo (Democratic Republic) Relations
1
Cryptography History
1
Dictators
1
Espionage
1
Espionage History
1
Espionage, American History
1
Espionage, Soviet History
1
Friends and associates
1
Great Britain Foreign relations
1
Great Britain History
1
Great Britain Relations
1
Holocaust, Jewish (1939-1945)
1
Impersonation
1
Ireland Foreign relations
1
Japan History
1
Japanese language Political aspects History
1
London (England)
1
Military history
1
Military intelligence History
1
National parks and reserves History
1
Natural history
1
Neutrality History
1
Operation Freshman, 1942
1
Operation Sunrise
1
more ...