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BATTLE // December 11, 1868

Battle of Avay

Overview

The Battle of Avay of 11 December 1868 was one of the last major combat engagements of the Paraguayan War, fought near the Avay stream in Paraguayan territory between the forces the Triple Alliance and the Paraguayan Army.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Battle of Avay on 11 December 1868 was one of the last major combat engagements of the Paraguayan War, reflecting the advanced stage of the Triple Alliance campaign into Paraguayan territory by late 1868. Commanded by the Marquess of Caxias on the Allied side, the Brazilian-led force of nearly 19,000 faced a Paraguayan force of approximately 5,000 under Bernardino Caballero. Paraguayan casualties of around 3,600 against an Allied loss of roughly 1,663 indicate the severe attrition suffered by Paraguay's remaining fielded strength at this stage of the war. As one of the final set-piece engagements before the conflict's conclusion, Avay underscored the collapse of organized Paraguayan resistance and the effective exhaustion of the country's capacity to mount conventional defense.

Forces & casualties

Troop strength

  • Empire of Brazil18,963
    medium
  • Paraguay5,000
    medium

Empire of Brazil fielded a 3.8 : 1 numerical advantage

Casualties

  • Empire of Brazil1,663
    medium9% loss rate
  • Paraguay3,600
    medium72% loss rate

Commanders (2)

Empire of Brazil

Paraguay

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Last verified June 2026
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