The "moderados" immediately took to undoing O'Donnell's legislation but Spain's economic situation took a turn for the worse; when Alejandro Mon, who had already saved Spain's finances, proved ineffectual, Isabella turned to her old warhorse, Ramón Narváez, in 1864 to make certain that things did not get out of hand; this only infuriated the "progresistas", who were promptly rewarded for their agitation by another O'Donnell government. General Juan Prim launched a major uprising against the government during O'Donnell's administration that prefigured future events; the rebellion was crushed brutally by O'Donnell, prompting the same sort of criticism that had toppled Espartero's government years earlier. The queen, listening to the opinion of the "cortes", again sacked O'Donnell, and replaced him with Narváez, who had just been sacked two years earlier.