I did read reports of the AU-forces that they have no defence against aerial attacks, no tactical aircraft and no air defence systems.
The Sudanese bombard with whatever plane they can get in the air (their Hinds and fighters are mostly grounded due to several problems)sometimes throwing grenades from light cargo-planes. The Sudanese sometimes coordinate this with  the relief-flights to the refugee camps to terrorise people when they are amassed for the food-distributions.
With European troops busy in Iraq, Afghanistan, Libanon, DR-Congo and a few other places, our politicians will think twice before doing something.

The struggle of man against tyranny is the struggle of memory against forgetting.(Kundera)