 Complete the following phrase:  Constructed by the British shipbuilders Armstrong Mitchell in the early 1880s, Esmeralda was hailed as the swiftest and most powerfully armed cruiser in the world by William Armstrong, the companys founder. Esmeralda was completed in 1884, and the ship was quickly deployed to Panama in the following year to show the Chilean flag and conduct gunboat diplomacy during an emerging crisis in the region. The cruiser was later used to support the Congressionalist cause during the 1891 