The war in Somalia started as a clan revolt against Siad Barre, the dictator of Somalia till 1991. 

https://en.wikipedia.org/wiki/Somali_Civil_War

Did you let your feeling provide you with information? South Yemen was a Socialist country, and many of the breakpoints in Yemen are not directly religion based.

https://en.wikipedia.org/wiki/Yemeni_Civil_War_(2015%E2%80%93present)

Read. Please.