On the 6th of March 1821 Santarosa and three associates had an interview with the prince, and on the 10th they carried out the military "pronunciamiento" which proclaimed the Spanish constitution.
At the close of the war the queen regent and her ministers attempted to elbow out Espartero and his followers, but a pronunciamiento ensued in Madrid and other large towns which culminated in the marshal's accepting the post of prime minister.
O'Donnell's pronunciamiento in 1856 put an end to the Cortes, and the militia was disarmed, after a sharp struggle in the streets of the capital.
On New Year's Day 1820 he made his pronunciamiento with his regiment at the village of Cabezas de San Juan.
A conflict now arose between the republican majority and Iturbide, which was settled by a military pronunciamiento in his favour, and the Congress elected him emperor.