The First Triumvirate (Spanish: Primer Triunvirato) was the executive body of government that replaced the Junta Grande in the United Provinces of the Río de la Plata (modern-day Argentina).
After the defeat of the patriotic forces at the Battle of Huaqui on 20 June 1811, the already damaged prestige of the Junta Grande received a fatal blow.
His departure gave room to the faction that supported liberal Mariano Moreno to take advantage of his absence and try to force the dissolution of the Junta.
With this government the morenistas successfully neutralized their opposition, but the internal struggles, the menace of an invasion from Brazil and the military misadventures of Manuel Belgrano in the north undermined their power.
José de San Martín, with the members of the Logia Lautaro (Lautaro Lodge) and the Sociedad Patriótica (Patriotic Society) which was formed by morenistas coincided on giving privilege to the organization of a liberation army and declaration of Independence.