Flag of the Argentine Confederation, the Predecessor State in Argentina from 1831 to 1852, and Vintage Televisions. The Argentine Confederation (Spanish: Confederacion Argentina) was the last predecessor state of modern Argentina; its name is still one of the official names of the country according to the Argentine Constitution, Article 35. It was the name of the country from 1831 to 1852, when the provinces were organized as a confederation without a head of state. The governor of Buenos Aires Province (Juan Manuel de Rosas during most of the period) managed foreign relations during this time. Under his rule, the Argentine Confederation resisted attacks by Brazil, Bolivia, Uruguay, France and the United Kingdom, as well as other Argentine factions during the Argentine Civil Wars. Rosas was ousted from power in 1852 by Justo Jose de Urquiza, after the battle of Caseros. Urquiza convened the 1853 Constituent Assembly to write a national constitution. Buenos Aires resisted Urquiza and seceded from the Confederation in 1852, becoming the State of Buenos Aires; the province would return to Argentina in 1861. In several ways, the Federal Pact acted as a constitution. In fact, the Argentine Constitution of 1853 starts by justifying its creation “with the purpose of fulfilling pre-existent pacts,” which refers to this and other agreements. The creation of a Constitutional Assembly had been planned long before 1853, but the negative of Juan Manuel de Rosas, governor of Buenos Aires and strong member of the treaty, delayed it. The members of the Pacto Federal joined the United Provinces of the River Plate in the founding of the modern state of Argentina. Full HD.