Perón was recruited by supporters of the director of the War Academy, General José Félix Uriburu, to collaborate in the latter's plans for a military coup against President Hipólito Yrigoyen. Perón, who instead supported General Agustín Justo, was banished to a remote post in northwestern Argentina after Uriburu's successful coup in September 1930. He was promoted to the rank of Major the following year and named to the faculty at the Superior War School, however, where he taught military history and published a number of treatises on the subject. He served as military attaché in the Argentine Embassy in Chile from 1936 to 1938, and returned to his teaching post. His wife was diagnosed with uterine cancer that year, and died on 10 September at age 36; the couple had no children.