Region
United States
20
Iraq
6
Sudan
6
Afghanistan
4
Middle East
4
Northern Ireland
3
South Sudan
3
Israel
2
Africa
1
Balkan Peninsula
1
Bosnia and Herzegovina
1
Brazil
1
China
1
Congo (Democratic Republic)
1
Korea
1
Korea (North)
1
Korea (South)
1
Palestinian National Authority
1
Persian Gulf Region
1
Romania
1
South Asia
1
Syria
1
Uganda
1