The Military Committee for National Salvation (; , CMSN) was a military government of Mauritania that took power in the 1979 coup d'état. It was installed by Mohamed Khouna Ould Haidalla, Ahmed Ould Bouceif and fellow officers, in an internal regime/military coup on April 6, 1979, removing Colonel Mustafa Ould Salek of the Military Committee for National Recovery (CRMN) from effective power. He was replaced by Mohamed Mahmoud Ould Louly in June 1979; Haidalla would later emerge as the main military strongman, and go on to assume full powers in the 1980 coup d'état, 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.