Region
Soviet Union
Soviet Union --
United States
21
United States --
21
China
3
China --
2
Russia --
2
Afghanistan --
1
Asia
1
Asia --
1
Baltic States
1
East Asia
1
East Asia --
1
Eastern Europe
1
Europe
1
Europe --
1
Europe, Eastern
1
Europe, Eastern --
1
India
1
India --
1
Korea
1
Korea --
1
Pacific Area
1
Pakistan
1
Pakistan --
1
Russia
1
United Nations
1
United Nations --
1
United states --
1