The Battle of Arroio Hondo, also known as Combat of Penimbu or Puru-Hué (Peru-Huê), took place on 3 August 1867, during the Paraguayan War.

Some months before the Passage of Humaitá, the Triple Alliance War was mostly stalled, lacking in decisive actions, something brought by in great part due to the Allied defeat in the Battle of Curupayty.

Momentum was, however, still in the hands of the Allies, who occupied part of Southern Paraguay and, better equipped, supplied and in greater numbers, were poised to strike at Asunción if they could overcome the Fortress of Humaitá.

[1] In the Penimbu region within Paraguay, some tens of kilometers away from Humaitá, a column of Paraguayan troops under the leadership of Commander Eustacio Rojas was attacked, in a cavalry charge, by a unit of the Brazilian Guarda Nacional [pt] under the command of Brigadier Andrade Neves.

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