A long article in FP 'Our man in Africa', namely Hissne Habr, at one time Chad's President and at the helm in the 'Toyota War' with Libya. It appears to place a lot of information, plus some new details in one place. I don't recall this happening, but a "week is a long time in politics":
Two AWACS surveillance planes, a contingent of F-15s, and tanker aircraft, along with some 600 U.S. support personnel, were deployed to Sudan to assist Habrs counteroffensive.
Link:http://foreignpolicy.com/2014/01/24/...FlashPoints%20[Manual]RSbestofprint

Note the focus is on Habre's human rights record and his pending prosecution in Senegal in 2015, after fleeing Chad twentytwo years ago.