In August, "Esmeralda" participated in the last naval operations of the war by supporting the landing of Congressionalist troops at Quintero Bay. On the 17th, she steamed near Valparaíso and fired three shots to alert the Presidential forces of the arrival of the Congressionalists. On the 21st, "Esmeralda" with the corvettes and engaged the Presidential ground forces during the Battle of Concón from the mouth of the Aconcagua River. Their gunfire did not kill many soldiers, but it severely demoralized the Presidential forces; "Scientific American" stated that their shells "raised fearful havoc". Finally on the 22nd, "Esmeralda" attacked the forts of Viña del Mar together with the ironclad , with a successful result.