Province of Cuyo
The Province of Cuyo was a historical Province of Argentina
Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

. Created on 14 November 1813 by a decree issued by the Second Triumvirate
Second Triumvirate (Argentina)
The Second Triumvirate was the governing body of the United Provinces of the Río de la Plata that followed the First Triumvirate in 1812, shortly after the May Revolution, and lasted 2 years....

, it had its capital on Mendoza
Mendoza, Argentina
Mendoza is the capital city of Mendoza Province, in Argentina. It is located in the northern-central part of the province, in a region of foothills and high plains, on the eastern side of the Andes. As of the , Mendoza's population was 110,993...

, and was composed by the territories of the present Argentine Provinces
Provinces of Argentina
Argentina is subdivided into twenty-three provinces and one autonomous city...

 of Mendoza
Mendoza Province
The Province of Mendoza is a province of Argentina, located in the western central part of the country in the Cuyo region. It borders to the north with San Juan, the south with La Pampa and Neuquén, the east with San Luis, and to the west with the republic of Chile; the international limit is...

, San Juan and San Luis
San Luis Province
San Luis is a province of Argentina located near the geographical center of the country . Neighboring provinces are, from the north clockwise, La Rioja, Córdoba, La Pampa, Mendoza and San Juan.-History:...


The region was part of Chile until 1778. It was transferred to Buenos Aires when La Plata became a Viceroyalty that year

Its first and foremost Governor was José de San Martín
José de San Martín
José Francisco de San Martín, known simply as Don José de San Martín , was an Argentine general and the prime leader of the southern part of South America's successful struggle for independence from Spain.Born in Yapeyú, Corrientes , he left his mother country at the...

, who devoted his Governorship to the creation of the Army of the Andes
Army of the Andes
The Army of the Andes was a military force created by the United Provinces of the Río de la Plata and mustered by general José de San Martín in his campaign to free Chile from the Spanish Empire...

 and the preparations for the Crossing of the Andes
Crossing of the Andes
The Crossing of the Andes was one of the most important feats in the Argentine and Chilean wars of independence, in which a combined army of Argentine soldiers and Chilean exiles invaded Chile leading to Chile's liberation from Spanish rule...

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