 He was replaced by Mohamed Mahmoud Ould Louly in May 1979; Haidallah would later emerge as the main military strongman, and go on to assume full powers, only to be deposed by Maaouya Ould Sid'Ahmed Taya in the 1984 coup d'état.The CMSN remained as an institution until 1992, when Taya introduced a multi-party system following the 1991 constitutional referendum – he himself lost power only in the 2005 coup d'état.The main achievement of the CMSN was to make peace with the Western Saharan Polisario Front, which had been fighting Mauritania since the government of President Moktar Ould Daddah entered the Western Sahara War in 1975.