[1] It represented the right-wing of the Chilean political spectrum, against the centrist Christian Democratic Party and the leftist coalition Popular Unity.

Three years later, in August 1973, after escalating political polarization, the Christian Democrats joined with the National Party in the same legislature against Allende.

The following month, newly appointed chief of staff General Augusto Pinochet led the 1973 military coup against Allende, after which the National Party voluntarily dissolved itself on 21 September 1973.

This process was interrupted in October 1983 when group leaders Carmen Sáenz, Silvia Alessandri and Alicia Ruiz-Tagle de Ochagavía attempted to reconstruct the National Party proper.

Thirteen backbench MPs joined the National Party, presided over by former Senator Patricio Phillips Peñafiel.