High Quality Content by WIKIPEDIA articles! The Battle of Caldera Bay, or the Sinking of the Blanco Encalada, was an engagement fought during the Chilean Civil War between Balmacedist and Congressional naval forces on 23 April 1891. It involved two Balmacedist torpedo boats, Almirante Lynch and Almirante Condell, sinking the Congressional armoured frigate Blanco Encalada. It was the first ever successful attack by a torpedo boat against an enemy warship, although a Turkish armed steamer, named the Intibah, had been sunk earlier during the Russo-Turkish War. The loss of the Blanco Encalada hindered the Congressional forces, but they ultimately defeated the Balmacedist forces in August of the same year.