The Battle of Paso Ipohy was an action planned by the Paraguayans that consisted of a surprise attack on a Brazilian camp near Humaitá, near the Tebicuary River in Paraguay, on December 25, 1867.

A Brazilian camp for Volunteers of the Fatherland was deployed near the Tebicuary River in Paso Ipohy in Paraguay.

Francisco Solano López realized that he could take a heavy blow to Brazilian troops there, as the surrounding region consisted of swamps and puddles that could facilitate a surprise action.

Valois Rivarola, chosen by Mariscal to plan the attack, selected Captain Eduardo Vera and 150 of his best men for the task.

Armed only with sabers and machetes, Vera's troops silently approached the Brazilian tents and attacked, taking them completely by surprise, and inflicting about 400 casualties without losing a single man.