The Khartoum government is launching sporadic but ineffective air raids, and patching up coalitions with SPLA dissidents to gain the troops they need to defend Juba. The rebels can't afford to throw any weapon away. It might be a lump of shell-mangled metal lying on the battlefield. It might be rusted from fire, lack stock, sight, or grip. Whatever it is, a special cadre of SPLA engineers will put it back into action.
Uniforms are hard to come by as are weapons.
Looking at them its hard to tell they are part of a military force at all. Torn clothes, and flip-flops instead of boots. What the SPLA lacks in training and equipment, however, it makes up for in morale, particularly after the fall of Yei. As the songs pick up any one of the men will run out in front gesturing with his weapon as though firing it, while others will howl over the song. There's nothing worse than a soldier who thinks to much.