Río de la Plata

State · 1811–1833 CE · at its largest around 1811 CE

The United Provinces of the Río de la Plata, the independence-era state formed after the May Revolution of 1810 in Buenos Aires and forerunner of Argentina.

On its lands while it lasted

• José de San Martín (1778 CE – 1850 CE): Argentine general who led campaigns that freed Argentina, Chile and Peru from Spanish rule.
• Bagé (1811 CE): Capital of Riograndense Republic (1836–1845).
• Crossing of the Andes (1817 CE): San Martín's Army of the Andes crossed the mountains from Mendoza into Chile, one of the most celebrated feats of the wars of independence.
• Alegrete (1831 CE): Capital of Riograndense Republic (1836–1845).

More on Wikipedia.