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BATTLE // April 17, 1866

Bataille d’Itapiru

Overview

The Battle of Itapirú took place during the Paraguayan War on April 17, 1866, after Brazil's capture of Purutué Bank a week earlier. The battle marked the beginning of the Triple Alliance's invasion of Paraguay.

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

Significance

The Battle of Itapirú on April 17, 1866, marked the opening of the Triple Alliance's ground invasion of Paraguay, making it a strategic threshold in the broader Paraguayan War. Coming one week after Brazil's capture of Purutué Bank, it represented a shift from preliminary riverine operations to direct incursion into Paraguayan territory. With a Brazilian force of approximately 10,000 engaging a Paraguayan defense of around 4,000, the engagement established the operational foothold from which the Alliance would prosecute the wider campaign into the country.

Forces & casualties

Troop strength

  • Empire of Brazil10,000
    medium
  • Paraguay4,000
    medium

Empire of Brazil fielded a 2.5 : 1 numerical advantage

Commanders (1)

Empire of Brazil

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6 sibling battles · 1 factions

Last verified June 2026
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