The current conflict, in which the Chadian military is involved, is the civil war against Sudanese-backed rebels. Chad successfully manages to repel the rebel movements, but recently, with some losses (see Battle of N'Djamena (2008)). The army uses its artillery systems and tanks, but well-equipped insurgents have probably managed to destroy over 20 of Chad's 60 T-55 tanks, and probably shot down a Mi-24 Hind gunship, which bombed enemy positions near the border with Sudan. In November 2006 Libya supplied Chad with four Aermacchi SF.260W light attack planes. They are used to strike enemy positions by the Chadian Air Force, but one was shot down by rebels. During the last battle of N'Djamena gunships and tanks have been put to good use, pushing armed militia forces back from the Presidential palace. The battle impacted the highest levels of the army leadership, as Daoud Soumain, its Chief of Staff, was killed.