South Sudan is not quite two years old.
The world's newest country was created in July 2011, after decades of fighting a civil war against the north.
But it is now facing its own internal rebellion. The army there is being accused of terrorizing its own people in the eastern state of Jonglei.
Caelin Briggs is with Refugees International in Juba, the capital of South Sudan.
She's been traveling through Jonglei, talking to people affected by the crisis there.
She says tens of thousands of people have had to flee the army's attacks and looting, and take refuge into the bush.