The March 23 Movement was a clandestine Marxist-Leninist political organization formed in Morocco in the early 1970s, named after a 1965 student protest. It emerged from the radical wing of the National Union of Moroccan Students (UNEM) and positioned itself in opposition to the monarchy.
Operating underground, the group was involved in significant political activism and faced repression during the "Years of Lead." Key figures included Abdelaziz Mouride and Mohamed El Boukili. The movement is considered a precursor to several leftist political currents in the country.
In the early 1980s, following a period of political liberalization, the movement transitioned into a legal political party. It founded the Organization of Democratic and Popular Action (OADP) in 1983, which participated in electoral politics and became part of the Socialist Union of Popular Forces (USFP) in 2005.