It purchased the newspaper Boletín Mercantil to serve as the party's official organ for disseminating its conservative views.
[3] Most of its members belonged to the Puerto Rican Volunteers Corps.
Partido Incondicional Español represented the conservative side of Puerto Rican politics under the Spanish sovereignty, while Partido Liberal Refomista represented the liberal side.
The party existed from 1870 until the end of Spanish sovereignty in Puerto Rico in 1898, when it dissolved.
During those 28 years, the party was presided first by Jose Ramon Fernandez, then by Marques de la Esperanza, and last by Pablo Ubarri.