Before revision: It was the first naval engagement between both navies and took place in front of Huanillos, off the (then) Bolivian coast, as the and gunboat found the Chilean corvette Magallanes on its way to Iquique.
After revision: Peruvian corvette UniónIt was the first naval engagement between both navies and took place in front of Huanillos, off the (then) Bolivian coast, as the and gunboat found the Chilean corvette Magallanes on its way to Iquique.