Region
United States
22
China
11
Soviet Union
6
Europe
5
Russia (Federation)
5
European Union countries
2
France
2
Germany
2
Italy
2
Asia
1
Berlin (Germany)
1
Berlin Wall, Berlin, Germany, 1961-1989
1
Colonies
1
Colonization
1
Cuba
1
Czech Republic
1
Europe, Eastern
1
Europe, Western
1
Former Soviet republics
1
Germany (East)
1
Germany (West)
1
Great Britain
1
India
1
Islamic countries
1
Israel
1
Mexico
1
Poland
1
Scandinavia
1
South Africa
1
South Asia
1
Turkey
1
Ukraine
1
Western countries
1