Military dictatorships promulgating an Islamic government have mostly run the country since independence from the UK in 1956. Over the past two decades, a civil war pitting black Christians and animists in the south against the Arab-Muslims of the north has cost at least 1.5 million lives in war and famine-related deaths, as well as the displacement of millions of others.
The US government's Sudan Peace Act of October 21, 2002 accused Sudan of genocide for killing more than 2 million civilians in the south during the civil war since 1983.
wikipedia.org dumped 2003-03-17 with terodump