 In June 1973, the group attempted to carry out a coup against the Allende government but failed, in an event known as the Tanquetazo.In July 1973, it received orders from the Chilean Navy, which opposed the Schneider Doctrine of military adherence to the constitution, to sabotage Chile's infrastructure.The collaboration between Fatherland and Liberty and the Chilean Armed Forces increased after the failed October 1972 strike which had sought to overthrow Allende socialist administration.