Nilotic
VIP
so it's really just israel
A little bit more complicated than that, but Israel made sure that Sudan suffered for its stances and alignments
What should be pointed out is that even when Israel was supporting us, Khartoum was the largest recipient of U.S. military aid after Egypt; and this is precisely why Sudan has C-130 Hercules aircraft and M60 Patton tanks.
Washington and Israel were on different sides of the war until Bashir arrived on the scene; the South was aligned with the Soviet Union during the Cold War and our military officers were trained by the Cubans.
We even received weapons from Gaddafi -- due to Garang's vision (unpopular within the South) of uniting the African and Arab worlds through Sudan. Even now, Egypt is our biggest ally in Africa -- prompting Ali Osman Taha to sardonically ask how well we were getting on with our "brothers" -- the Egyptians.