The Battle of Acayuazá was fought on July 18, 1868, on the outskirts of Reduto-Corá between the allied troops of the Triple Alliance and the Paraguayan army.

[1] On the morning of July 18 the allied troops advanced to the front in two parallel columns, with the obvious purpose of taking over the Paraguayan bunker at Reduto-Corá.

[1] The Argentine troops pushed forward, reaching an area where the Paraguayans scattered.

This left the allies within strike range of the Reduto-Corá artillery, which suddenly erupts in a volley of gunfire.

It was too late for an orderly withdrawal; the Brazilians were routed and fled, but the Argentines were surrounded by the regrouping Paraguayan forces.