Argentine Confederation

The Argentine Confederation was a South American republic that existed from 1831 to 1861, serving as the last predecessor state of modern Argentina. During much of its existence, from 1831 to 1852, the provinces were organized as a confederation without a head of state, with the governor of Buenos Aires Province managing foreign relations. Under Juan Manuel de Rosas, the Confederation engaged in conflicts with Brazil, Bolivia, Uruguay, France, the United Kingdom, and other Argentine factions. Rosas was ousted in 1852, leading to the 1853 Constituent Assembly. Buenos Aires seceded in 1852, becoming the State of Buenos Aires, but rejoined in 1861.