Emilio Massera was born in
Paraná,
Entre Ríos, to Paula Padula and Emilio Massera, grandson of immigrants from Switzerland. Massera entered Argentina's Naval Military School in 1942, obtaining his commission as a midshipman in 1946. In June 1955, as a Frigate Captain and one of the aids to the Minister or the Navy, he may have been involved in the
bombing of Plaza de Mayo. After the
Revolución Libertadora in 1955, Massera entered the Naval Information Service. During his career he occupied different positions within the Navy, including command of the sail training ship
ARA Libertad and command of the Sea Fleet in 1973. On December 6th, 1973, Massera was designated General Commander of the Argentine Navy by Decree 552, signed by President Perón and Minister Angel F. Robledo (published on the Boletín Oficial de la República Argentina on December 13th), and, on August 23rd, 1974 he was promoted to full Admiral by Decree Nr. 612, signed by President María Estela Martínez de Perón and Minister José López Rega.. On June 15th, 1974, he, along with the commanders of the Army and the Air Force, accompanied then-Vice President Isabel Perón to Italy and Spain, where she met with Francisco Franco. ==Military junta and resignation==