The first IAF component to arrive in Chad were the Zairean paratroopers; they were followed by Nigerian and Senegalese forces, bringing the IAF to 3,275 men. Before the peace-keeping force was fully deployed, Habré had already taken advantage of Libya's withdrawal, and made massive inroads in eastern Chad, including the important city of Abéché, that fell on 19 November. Next to fall was Oum Hadjer in early January 1982, only from Ati, the last major town before the capital. The GUNT was saved for the moment by the IAF, the only credible military force confronting Habré, which prevented the FAN from taking Ati.