The National Union Movement (Spanish: Movimiento de Unión Nacional, MUN) was a Chilean political party that supported the military dictatorship of General Augusto Pinochet, founded on 27 November 1983[2] by Andrés Allamand, Francisco Bulnes Sanfuentes, Pedro Ibáñez Ojeda and other former members and supporters of the National Party, the Radical Democracy and Christian Democrats expelled from the party.

[3] Many members of the National Union Movement occupied public offices and important positions during that regime.

[6] It joined with other movements that supported the military dictatorship a coalition known as the Group of Eight (Grupo de los Ocho), which later evolved to the National Democratic Agreement.

[7] On 9 January 1987, the MUN made an appeal to the Independent Democratic Union (UDI) of Jaime Guzmán and the National Labour Front (FNT), led by former Interior Minister Sergio Onofre Jarpa, to form a single right-wing party.

Following this, on 8 February proceedings were initiated to form National Renewal (RN), made its definitive legalization concluded on 29 April 1987.