Region
United States
10
Southeast Asia
4
Vietnam
4
Asia
3
Germany
3
Japan
3
Europe
2
Indochina
2
Middle East
2
South Asia
2
Africa
1
Asia, Southeastern
1
Cuba
1
East Asia
1
Eastern Europe
1
El Salvador
1
Europe, Eastern
1
Germany (West)
1
Korea
1
Latin America
1
Pacific Area
1
Poland
1
Sources
1
Soviet Union
1
Taiwan
1