During the campaign, both parties made similar proposals to reduce authoritarianism and the political influence of the military, and to maintain the Argentine claim in the Falkland Islands sovereignty dispute. Alfonsín denounced a pact between the military and the Peronist unions that sought an amnesty for the military. He maintained that the armed forces should be subject to the civilian government and that unions should be regulated. He also proposed an investigation into the actions of the military during the Dirty War. He closed his campaign by reading the preamble of the constitution of Argentina. The last rally was at the "Plaza de la República", and was attended by 400,000 people.