The War in Darfur , also nicknamed Name_conferral the Land Cruiser War , is a major armed conflict Hostile_encounter in the Darfur region of Sudan that began Process_start in February 2003 when the Sudan Liberation Movement ( SLM ) and the Justice and Equality Movement ( JEM ) rebel groups began Process_start fighting Hostile_encounter the government of Sudan , which they accused Judgment_communication of oppressing Darfur 's non-Arab population .