[1] In the 1982 general election, Pedro Schwartz ran as an independent in the lists of the coalition formed by People's Alliance and the People's Democratic Party (AP-PDP), winning a seat for Madrid.

He convinced the coalition leader, Manuel Fraga, of the need to create a liberal party with which would challenge for the votes of the political center.

Fraga acceded and Schwartz created the Liberal Union party that joined the coalition between AP and PDP (as a result, the coalition was renamed AP-PDP-UL).

[3] On November 22, 1984, Liberal Union appointed Rafael Márquezas president of the party, replacing Antonio Fontán.

[4] On December 22, 1984, the Liberal Union agreed to merge with another liberal party that had approached the orbit of the coalition, with the party taking the name of the second: Liberal Party, so that the center-right coalition was renamed AP-PDP-PL (at the time of the 1986 general election it would be named People's Coalition).