CaptionIsma and Medina, both internally displaced, make their way to school. As a result of the violence that affects the Darfur region of Sudan since early 2003, around two million people fled their homes, and more than 150,000 are thought to have died. Rebel groups such as the Sudan Liberation Army (SLA) and the Justice and Equality Movement (JEM) claimed that Sudan's government was oppressing black Africans in favor of Arabs. The government was accused of lending support to Arab militias such as the Janjaweed, which rebels said was conducting ethnic cleansing in the Darfur area. Some 200,000 people sought safety in neighboring Chad, but many were camped along a 600-kilometer stretch of the border where they remained vulnerable to attacks from Sudan.