The National Movement of the Revolution (French: Mouvement national de la révolution abbreviated MNR) was a political party in the Republic of the Congo. MNR was founded at a congress held June 29 to July 6 1964. MNR was instituted as the sole legal political party in the country on July 20 1964 according to the Law No. 25-65. Pre-existing political parties were ordered to fuse into the MNR. MNR adopted scientific socialism as its ideological foundation.