The Portuguese conquest of the Banda Oriental resulted in the annexation of present-day Uruguay into the Portuguese Empire, shaping the region's future independence.
Key Facts
- Duration
- 1816–1820 (four years)
- Resulting province
- Cisplatina
- Occupation ended
- 1828
- Insurgent privateer reach
- Europe, Africa, and the Caribbean
- Annexing power
- United Kingdom of Portugal, Brazil and the Algarves
Location
Cause → Event → Consequence
Competition for control of the Banda Oriental — encompassing present-day Uruguay, northern Argentine Mesopotamia, and southern Brazil — led the United Kingdom of Portugal, Brazil and the Algarves to challenge the Artiguista forces of the Federal League. José Gervasio Artigas and allied provincial leaders resisted Portuguese expansion into the strategically vital Río de la Plata region.
Between 1816 and 1820, Portuguese forces under Carlos Frederico Lecor fought the Artiguista troops led by José Gervasio Artigas and Federal League commanders such as Andrés Guazurary. The conflict extended beyond land into a naval and privateer war, with insurgent vessels operating under Buenos Aires and Artigas flags harassing Portuguese shipping across three continents.
The four-year conflict ended with the annexation of the Banda Oriental into the United Kingdom of Portugal, Brazil and the Algarves as the province of Cisplatina. The occupation continued under the Empire of Brazil from 1824 until 1828, after which Uruguay eventually emerged as an independent republic.
Belligerents & Mobilization Analysis
Side A
1 belligerent
José Gervasio Artigas, Andrés Guazurary.
Side B
1 belligerent
Carlos Frederico Lecor.