Subject Region
United States
128
Great Britain
40
Soviet Union
23
Germany
15
China
10
France
9
Germany (East)
9
Canada
7
Communist countries
6
Europe
5
Russia (Federation)
5
England
4
Iraq
4
Middle East
4
Confederate States of America
3
Czechoslovakia
3
Iran
3
Russia
3
Afghanistan
2
Africa, French-speaking West
2
Australia
2
Europe, Eastern
2
Europe, Western
2
Germany (West)
2
India
2
Ireland
2
Israel
2
Mexico
2
New York
2
New York (State)
2
Palestine
2
Romania
2
Switzerland
2
Vatican City
2
Africa, North
1
Alberta
1
Bletchley (Buckinghamshire)
1
Bletchley (Buckinghamshire, England)
1
Bletchley Park (Milton Keynes, England)
1
Bulgaria
1
Burma
1
Colombia
1
Crimea (Ukraine)
1
Cuba
1
Egypt
1
Espana
1
Foreign countries
1
Former communist countries
1
Golden Triangle (Southeast Asia)
1
Indochina
1
more ...