Region
United States
United States --
16
China
2
China --
2
Europe
2
Europe --
2
Pacific area --
2
Russia (Federation)
2
Russia (Federation) --
2
Soviet Union
2
Asia
1
Asia, Southeastern
1
Asia, Southeastern --
1
Europe, Eastern
1
Europe, Eastern --
1
Iraq
1
Iraq --
1
Iraq war, 2003
1
Pacific area
1
Russia
1
Singapore
1
Singapore --
1
Soviet --
1
Soviet Union --
1