Following the dismissal of Miguel Primo de Rivera in January 1930 by King Alfonso XIII, the party was succeeded by the National Monarchist Union.

[3] However, some scholars settle for official figures, e.g. in the province of Almería the UP membership is estimated at 30,000[4] and in mid-size Valencian towns like Gandia, Torrent or Utiel at 500–1,000 members.

[8] These estimates are pretty much a guesswork, though some scholars base their calculations on circulation of the UP daily La Nación, at its peak printed in 50,000 copies.

[11] The communist state parties of the late 20th century recorded a membership rate between 4% in the USSR[12] to 8–10% in Poland[13] or Czechoslovakia.

[14] FET y de las JONS, the state party during the Francoist dictatorship, boasted of some 0.9m members in 1942, around 3% of the Spanish population.