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 prisoners were returned to Spain with their “honors of war” on American ships. The battle was the end of any noteworthy Spanish naval presence in the New World. It forced Spain to re-assess its strategy in Cuba and resulted in an ever-tightening blockade of the island. While fighting continued until August, when the Treaty of Paris was signed, all surviving Spanish capital ships were now husbanded to defend their homeland leaving only isolated units of auxiliary vessels to defend the coast. Uncontested U.S. control of the seas around Cuba made resupply of the Spanish garrison impossible and its surrender inevitable.