Ejército Grande

The so-called Ejército Grande (English: Grand Army), also called the Ejército Grande Aliado Libertador (English: Grand Allied Liberating Army), was the coalition army that in 1852, under the command of the governor of Entre Ríos, Justo José de Urquiza, invaded the provinces of Santa Fe and Buenos Aires and defeated Juan Manuel de Rosas's army, which until that moment was in command of the foreign relations of the Argentine Confederation.

Consisting of about 24,000 men, the majority from the provinces of Entre Ríos and Corrientes, also including 4,000 Brazilians, who were the only professional soldiers, and some 1,600 Uruguayans.

To put the states of Entre Ríos and Corrientes in a situation to be able to help pay the extraordinary expenses they will have to make with the movements of their army, His majesty, the Emperor of Brazil would provide them, as a loan the monthly sum of one hundred thousand patacons for four months counting from the date in which these states ratify this agreement.After removing the siege of Montevideo, the Ejército Grande started to form, with the forces there for the siege, and incorporating the soldiers from Buenos Aires province that were in the city.

Between 24 December 1851 and 6 January 1852, the Ejército Grande crossed the Paraná River entering the territory of Santa Fe province.

Forty days later, on 3 February 1852, fought and obtained victory at Battle of Caseros near the city of Buenos Aires.