Action of 13 June 1898 decided to withdraw. At the outbreak of the Spanish–American War Cienfuegos was a strategically important port due to its facilities and good communications with Havana. Some prewar plans recommended its prompt capture, but instead it was blockaded, along with some other important ports of the southern coast of Cuba such as Santiago de Cuba and Manzanillo. The most powerful Spanish naval units of the island, meanwhile, had been gathered in Santiago, and submarine defenses consisting mainly of torpedoes had been installed in the major ports of Havana, Cienfuegos, Santiago and San Juan de Puerto Rico. The naval units based in
Battle of Santiago de Cuba and later research by historians, have suggested that nearly 85% of the Spanish ammunition at Santiago was utterly useless, either defective or simply filled with sawdust as a cost-saving measure for practice firing. The American ammunition had no such issues of lethality. "Vizcaya" continued the fight until overwhelmed, and by the end of the engagement she had been struck as many as 200 times by the fire from "Brooklyn" and "Texas". "Brooklyn" had closed to within when she finally delivered an round which, according to witnesses, may have detonated a torpedo being prepared for launch. A huge explosion ensued, "Vizcaya"