Sudan’s transitional authorities have signed a peace deal with some rebel groups after a year of negotiations in South Sudan’s capital, Juba. A handful of rebel groups have battled the army and allied militias in the western region of Darfur and the southern states of South Kordofan and Blue Nile, some splintering after decades of civil conflict. These are the key ones: *Justice and Equality Movement (JEM) The JEM, led by Jibril Ibrahim, is one of two significant groups from the western region of Darfur to sign the peace deal. The group was among mostly non-Arab rebels who took up…