Siege of Uruguaiana

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Battle of Uruguaiana
Part of the Paraguayan War
Sítio da Cidade de Uruguaiana..JPG
Siege of Uruguaiana
Date August–September, 1865
Location Uruguaiana, Brazil
Result Allied victory, Paraguayan surrender on 18 September

 Empire of Brazil



Commanders and leaders
Paraguay Col. Estigarribia Surrendered Empire of Brazil Pedro II
Empire of Brazil Conde d'Eu
Argentina Bartolomé Mitre
Uruguay Flores
  • 8,000 men[1]:39
  • 8 Cannons
Casualties and losses
  • 5,545 surrendered
    the rest died of hunger and sickness[1]:40
  • unknown

The Siege of Uruguaiana was an engagement in the Paraguayan War that began in late August, 1865, and ended on the 18th of September that year when the Paraguayans were forced to surrender due to low food supplies, despite President López's order to the Paraguayan commander, Colonel Estigarribia, not to do so. After the allied victory at Uruguaiana, Lopéz withdrew his army from Argentina and Brazil.


The Paraguayan Army had captured Uruguaiana at 5 August 1865, without any resistance.[2] Yet, following their defeat in the Battle of Yatay, the Paraguayans fortified Uruguayana with 8,000 men and an abattis. Col. Estigarribia faced the combined allied armies of Brazil, Argentina, and Uruguay.[1]:39 On July 16, the Brazilian Army reached the border of Rio Grande do Sul and joined with President Mitre's forces to surround Uruguaiana by Sept.[1]:39 The Brazilian Navy held the river with the steamers Taquary, Tramandahy, Onze de Junho, Iniciador, Uruguay, and Unido.[1]:39


A call for Uruguayana to surrender was ignored on 4 Sept.[1]:40 On September 11, emperor Pedro II arrived at the scene of the siege, where there were the presidents of Argentina Bartolomé Mitre and Uruguay Venancio Flores and several military leaders, as Admiral Tamandaré. The allied forces of the siege counted on 17,346 combatants and 12,393 Brazilians, Argentine 3,802 and 1,220 Uruguayans, and 54 guns. The surrender came on September 18 when Estigarribia's men had exhausted all food except sugar.[1]:40


President Lopez evacuated Corrientes in order to defend Paraguay's frontier. Gen. Resquin commanded the evacuation, taking over 100,000 head of cattle and other livestock across the Paraguay River at Paso de la Patria from 31 Oct. until 3 Nov.[1]:40


  1. ^ a b c d e f g h i Hooker, T.D., 2008, The Paraguayan War, Nottingham: Foundry Books, ISBN 1901543153
  2. ^ Leuchars, Chris. To the Bitter End: Paraguay and the War of the Triple Alliance (2002), Chapter 10.