 Complete the following phrase:  His parents were Manuel Saavedra Cabrera, son of the president of the First Government of Buenos Aires in 1810 and Argentine general, Cornelio Saavedra, and Josefina Rodriguez Salcedo. He married Dorotea Rivera Serrano, daughter of Chilean General Juan de Dios Rivera and Freire de Andrade and Galeazzo Maria del Rosario Alfaro Serrano. At the age of 15 years he entered the military academy, graduating with the rank of second lieutet of infantry in the Chilean Army in the following year. In 1837 he was assigned to Battalion Chillán, where he rose to lieutet at the age of 17 years. In 1847 he was promoted to the rank of sergeant major and retired from active duty for health reasons in 1849. Two years later he was called to participate in the 