Region
United States
Iraq
15
Afghanistan
12
Central African Republic
10
Balkan Peninsula
8
Burundi
7
Sudan
7
China
5
South Sudan
5
Congo (Democratic Republic)
4
Middle East
4
Syria
4
Korea
3
Korea (North)
3
Korea (South)
3
Libya
3
Germany
2
Africa, North
1
Colombia
1
Europe
1
Great Lakes Region (Africa)
1
Iran
1
Japan
1
Kosovo (Republic)
1
Persian Gulf Region
1
Russia (Federation)
1
Rwanda
1
Timor-Leste
1
Ukraine
1