French blockade of the Río de la Plata

French blockade of the Río de la Plata
Part of the War of the Confederation and Guerra Grande

The French fleet in the Rio de la Plata in full action
Date28 March 1838 – 29 October 1840
Location
Río de la Plata
Result

Argentine victory

  • Mackau-Arana treaty
Belligerents
Argentina
Supported by:
Blancos		 France
Supported by:
Unitarians
Colorados
On war:
Peru–Bolivian Confederation

The French blockade of the Río de la Plata was a two-year-long naval blockade imposed by France on the Argentine Confederation ruled by Juan Manuel de Rosas. It closed Buenos Aires to naval commerce. It was imposed in 1838 to support the Peru–Bolivian Confederation in the War of the Confederation, but continued after the end of the war. France did not land ground forces, but instead took advantage of the Uruguayan Civil War and the Argentine Civil Wars, supporting Fructuoso Rivera and Juan Antonio Lavalleja against Manuel Oribe and Rosas.

After two years without the expected results, France signed the Mackau-Arana treaty with the Argentine Confederation, ending the hostilities.

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