Martín Yanzón (1799 – 29 July 1842 ) was an Argentine soldier and caudillo who died fighting against the supporters of the dictator Juan Manuel de Rosas.
In 1831 he joined Quiroga's army and fought under his command in the Battle of La Ciudadela, and was promoted to colonel by Governor Valentín Ruiz.
In this campaign, Yanzón and Nazario Benavídez, both later to be provincial governors, were on the staff of the second Auxiliary regiment of the Andes commanded by Aldao.
This column gained a partial victory over the Ranquel chief Yanquetruz,[1] in the battle of Arroyo del Rosario on 31 March and 1 April 1833.
[3] He reorganized the judicial system for tax purposes, and divided the city into two departments, North and South, based on the parishes of Pueblo Viejo (Conception) and Ciudad.
It was clear that it had been organized from San Juan by Colonel Lorenzo Barcala, the most famous of the black officers in Argentina's history.
Yanzón and Oro fled to Chile, while Benavídez assumed the government of San Juan, and was to rule the province for the next two decades.
He remained for some time in La Rioja, protected by his former enemy Brizuela, and then joined forces with Gregorio Aráoz de Lamadrid, participating in the Battle of Rodeo del Medio, after which he returned to Chile.