ajority of blank votes because of the Peronist proscription. Arturo Frondizi from the UCR became popular by opposing the military rule, and got elected in the following elections. The military, however, was reluctant to allow Peronism to influence the new government, and allowed him to take power on condition he stayed aligned with them. The military frequently interfered on behalf of conservative, agrarian interests however, and the results were mixed. His policies encouraged investment to make the country self-sufficient in energy and industry, helping reverse a chronic trade deficit for Argentina. His efforts to stay on good terms with both Peronists and the military, without fully supporting either one, earned him the distrust and rejection of both. Frondizi lifted the Peronist proscription, leading to a Peronist victory in several provinces, rejected by the military. A new coup ousted him from power, but a swift reaction by José María Guido (president of the Senate) applied the laws related to power vacuums and became president instead of the military. The elections were repealed and Peronism proscribed again. Arturo Illia was elected in 1963 but, despite prosperity, his attempts to include Peronists in the political process resulted in the armed forces retaking power in a coup in 1966. The Argentine Revolution, the new military government, sought to rule in Argentina indefinitely.
The new military Junta appointed Juan Carlos Onganía as president. He closed the Congress, banned all political parties and dismantled all student unions and many worker unions. Popular discontent led to two massive protests, the Cordobazo in Córdoba and the Rosariazo in Rosario. Onganía was replaced by Roberto M. Levingston, and shortly after there was a huge political commotion with the kidnapping and execution of the former de facto president Aramburu. The crime was committed by the Montoneros, who, along with the People's Revolutionary Army (ERP), began Guerrilla