Military, diplomatic and Argentine ruler born on October 25, 1789 in Santo Ángel Custodio (Eastern missions) and died in New York in 1852. As a boy of thirteen, Carlos María joined the infantry regiment of Buenos Aires. A year later he/she embarked with his family, in an expedition into Spain. Attacked in the Bay of Cadiz by English ships, both he/she and his father they were prisoners and they were driven to London, where they were released in 1806.
Married to Carmen Quintanilla, Carlos María de Alvear amounted to second lieutenant of police, and in 1811, became London linked to the lodges that conducive to the emancipation of the Spanish American provinces. For this purpose he/she arrived in 1812 in Buenos Aires together with Colonel San Martín and other compatriots. This group organized the logia Lautaro, staged a coup and imposed a new Government, which brought together the Congress and constitutionally organized the country to ensure its independence. Thus emerged the year 12th Assembly, presided by Alvear. But a failure to comply with the proposed objectives, led to the installation of a directory.
Alvear was appointed Chief of the army of the Alto Peru, but he/she rejected it and in 1815 was appointed Supreme Director of Buenos Aires. At three months, by its poor management, was removed from office and exiled to Brazil. His Government had been a violent dictatorship and only able to return to the country in 1820 thanks to an amnesty law. In 1824 Rivadavia noted him on a diplomatic mission to London, where he/she stayed for a few years.
After holding the Ministry of war in the Government of Rivadavia, Carlos María de Alvear became Chief of the army in the war against Brazil. On that occasion got the brilliant triumph in the battle of Ituzaingó. The revolution of 1828 counted it among its addicts.
In 1838 Juan Manuel de Rosas appointed him Minister Plenipotentiary to the United States.