Camps in South Sudan struggling to cope as thousands flee fighting in neighbouring South Kordofan.
Fighters from the Sudan Peoples’ Liberation Movement (SPLM) North took part in the campaign to create an independent South Sudan state.
A year later however, feeling their fight is not yet complete, some members of the SPLM remain in the north, and they are not short of recruits.
For those still prepared to carry arms and endure airstrikes and artillery bombardments by Sudanese troops, the ultimate goal is to topple Sudanese President Omar al-Bashir.
Al Jazeera’s Peter Greste reports from SPLM-held territory in South Kordofan.