On his 2005 album, Ceasefire, Jal raps in four languages: Arabic, English, Swahili and Nuer.

NPR: Emmanuel Jal: From Child Soldier to Rising Star

Both groups are Nuer, but hate each other with a grimness that has come to characterise relations between many pastoralist peoples in Africa.

ECONOMIST: Treating both sides of an intractable conflict

An attack on the town's southern flank had been repulsed after the SPLA, backed by UN armoured personnel carriers, had fired at the Lou Nuer, she said.

BBC: Jonglei clashes: South Sudan declares a disaster