The Battle of Curupayty took place on September 22, 1866, during the Paraguayan War. This conflict involved Paraguay against an alliance of Argentina, Brazil, and Uruguay. The battle was significant for its strategic location, as it was fought near the Curupayty Fort, which was a key defensive position for Paraguay. In this battle, Paraguayan forces, led by General José E. Estigarribia, successfully defended their position against a much larger coalition army. The outcome demonstrated Paraguay's resilience and tactical capabilities, despite the eventual defeat in the broader context of the war. The battle is remembered for its intense fighting and the high casualties on both sides.