This article reads:
Omar al-Bashir charged with Darfur genocide
https://www.theguardian.com/world/2010/jul/12/bashir-charged-with-darfur-genocide
A very memorable book I have read is one on the "Lost Boys" of Sudan, there are a number of these books,
they some came to the USA. The article in the OP says this al Bashir targeted "non-Arabs" (though the book I read makes it clear, Arabs in Sudan are often Arab speaking but they are still black).
It wasn't this one, it was another but it was a great read.
They also had to fool with a lot of slavery as well. Often Christians being sold into slavery.
So, now, there is a "South Sudan" but the war goes on... and it seems it is a more tribal war.
By the way, in the book I read, the lad, the boy was just fleeing the trouble in Sudan. He wasn't a soldier or anything like on the book cover here. He only fled, he was able to make it to a refugee camp in Kenya.