The main achievement of the CMSN was to make peace with the Western SaharanPolisario Front, which had been fighting Mauritania since the Government of PresidentMoktar Ould Daddah entered the Western Sahara War in 1975. The CMSN opted for a full and complete withdrawal from the conflict, evacuating southern Río de Oro (which had been annexed as Tiris al-Gharbiyya) and recognizing the Polisario as the representative of the Sahrawi people;[4] this led to a crisis in relations with Morocco, which had similarly annexed the northern two-thirds of the country, and was also facing Sahrawi resistance.