Onganía shut down Congress, banned all political parties, and dismantled student and worker unions. In 1969, popular discontent led to two massive protests: the ''Cordobazo'' and the ''Rosariazo''. The terrorist guerrilla organization Montoneros kidnapped and executed Aramburu. The newly chosen head of government, Alejandro Agustín Lanusse, seeking to ease the growing political pressure, allowed Héctor José Cámpora to become the Peronist candidate instead of Perón. Cámpora won the March 1973 election, issued pardons for condemned guerrilla members, and then secured Perón's return from his exile in Spain.