The "Revolución Libertadora" which overthrew Juan Domingo Perón was triggered in part by his actions towards the press, as well as the imprisonment of opposition leaders and economic instability. For example, Perón incited his followers to wreck the offices and printing presses of newspapers who criticized him and he jailed the leader of the opposition, Ricardo Balbin, of the Radical Civic Union party. The military Revolución Libertadora against Perón for these actions led to three years of military rule under Aramburu, who allowed elections to be held in 1958 (won by Arturo Frondizi).