Moktar Ould Daddah
Once the Mali Federation collapsed, the jailed UNM leaders were released. Subsequently the party moved closed to Moktar Ould Daddah. The party was pressured to align with PRM and on October 10, 1960 the two parties formed a united front. At a meeting held on June 30, 1961 leaders of PRM, UNM and the former Nahda agreed to merge their parties. Subsequently, the Mauritanian People's Party (PPM) was formed as the sole legal party in the country.