other · South America
Cisplatina
Origins
Portuguese forces from Brazil invaded the Banda Oriental in 1816 to crush José Artigas, and General Carlos Frederico Lecor entered Montevideo in January 1817, ending the Eastern Province. In 1821 a congress in Montevideo, under Portuguese pressure, voted to annex the territory as the Cisplatine Province.
Rule and society
Lecor governed with the support of Montevideo's merchants and landowners. When Brazil declared independence in 1822, Cisplatina passed to the Empire of Brazil after Portuguese troops in Montevideo were expelled in 1824. In 1825 the Thirty-Three Orientals led by Juan Antonio Lavalleja landed and declared union with the United Provinces of the Río de la Plata, sparking the Cisplatine War.
Decline and legacy
Neither side could win: Argentina's victory at Ituzaingó in 1827 was offset by a Brazilian blockade. Through British mediation, the Preliminary Peace Convention of 1828 created the independent Oriental Republic of Uruguay.
Lineage
On the connections map
Open the full map →Connections (3)
- Cisplatina was a province of United Kingdom of Portugal, Brazil and the Algarves1817 CE – 1822 CE
- Eastern Province was conquered by Cisplatina1817 CE
- Cisplatina was a province of Brazilian Empire1822 CE – 1828 CE
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Cite this page
- APA
- The Epoch Institute. (2026). Cisplatina. In The Epoch Institute States Register. https://the-epoch-institute.org/state/cisplatina
- MLA
- “Cisplatina.” The Epoch Institute States Register, The Epoch Institute, 2026, https://the-epoch-institute.org/state/cisplatina. Accessed .
- Chicago
- The Epoch Institute. “Cisplatina.” The Epoch Institute States Register. 2026. https://the-epoch-institute.org/state/cisplatina.
- Harvard
- The Epoch Institute (2026) ‘Cisplatina’, The Epoch Institute States Register. Available at: https://the-epoch-institute.org/state/cisplatina (Accessed: ).
Last reviewed October 2026Random state ↻