Battle of Monte Castello. According to Marshal Cordeiro de Farias, Castello won exceptional prestige at FEB, for being a great strategist and having a privileged head. Promoted to Colonel in 1945, Castelo Branco returned to Brazil with the firm intention of transmitting his professional experiences to the officers of the Army. In this way, it assumed the position of Director of Studies of the ECEME, and transformed this school into a true center of doctrinal investigations. Castelo Branco systematized, mainly between 1946 and 1947, the reasoning method for the study of decision factors, recommended by the French Military Mission, with a structure of work within the command, better disciplining the activities of the Commander and his Staff Officers. In 1955, he helped with the Army's administrative reshaping and supported the military movement headed by the Minister of War, General Henrique Teixeira Lott, who secured the inauguration of President-elect Juscelino Kubitschek, who at that time was threatened with a military coup. Months later, when trade union organizations resolved to hand over to the Minister a golden sword, Castelo severely broke with General Lott. The press recorded a few moments of this misunderstanding. As General, he commanded ECEME, between September 15, 1954, and January 3, 1956. During this period, he perfected his Command Work of 1948, seeking to better suit him characteristics of Brazilian Chiefs and Staff Officers. Conferences such as "The War Doctrine and the Modern War" and "Security Problems", held in ECEME, are milestones in the evolution of the doctrinal thinking of this school. He also commanded the 8th Military Region in Belém, the 10th Military Region in Fortaleza and the IV Army in Recife. At the time he reached the Presidency of the Republic he was Chief of Staff of the Army, a position he held from September 13, 1963, to April 14, 1964. Political career Castelo Branco became one of the leaders of the 1964 Brazilian coup d'état that overthrew Goulart and ended the Fourth Brazilian Republic. On April 11, Congress chose him to serve out the remainder of Goulart's term and he took the oath of office on April 15, 1964. Castelo Branco was the second Brazilian Field Marshal to become President of the nation through a coup d'état, the first was Deodoro da Fonseca, who deposed Emperor Pedro II of Brazil in 1889, ended the Brazilian Empire and established the First Brazilian Republic. Castelo Branco was