Though the damage inflicted on the city was minimal, the Americans established a blockade in the city's harbor, San Juan Bay. On June 22, the cruiser and the destroyer delivered a Spanish counterattack, but were unable to break the blockade and Terror was damaged. The land offensive began on July 25, when 1,300 infantry soldiers led by Nelson A. Miles disembarked off the coast of Guánica. The first organized armed opposition occurred in Yauco in what became known as the Battle of Yauco. This encounter was followed by the Battle of Fajardo. The United States seized control of Fajardo on August 1, but were forced to withdraw on August 5 after a group of 200 Puerto Rican-Spanish soldiers led by Pedro del Pino gained control of the city, while most civilian inhabitants fled to a nearby lighthouse. The Americans encountered larger opposition during the Battle of Guayama and as they advanced towards the main island's interior. They engaged in crossfire at Guamaní River Bridge, Coamo and Silva Heights and finally at the Battle of Asomante. The battles were inconclusive as the allied soldiers retreated. A battle in San Germán concluded in a similar fashion with the Spanish retreating to Lares. On August 9, 1898, American troops that were pursuing units retreating from Coamo encountered heavy resistance in Aibonito in a mountain known as Cerro Gervasio del Asomante and retreated after six of their soldiers were injured. They returned three days later, reinforced with artillery units and attempted a surprise attack. In the subsequent crossfire, confused soldiers reported seeing Spanish reinforcements nearby and five American officers were gravely injured, which prompted a retreat order. All military actions in Puerto Rico were suspended on August 13, after U.S. President William McKinley and French Ambassador Jules Cambon, acting on behalf of the Spanish Government, signed an armistice whereby Spain relinquished its sovereignty over Puerto Rico. Cámara's squadron Shortly after the war began in April, the Spanish Navy ordered major units of its fleet to concentrate at Cádiz to form the 2nd Squadron, under the command of Rear Admiral Manuel de la Cámara y Livermoore. Two of Spain's most powerful warships, the battleship and the brand-new armored cruiser , were not available when the war began—the former undergoing reconstruction in a French shipyard and the latter not yet delivered from her builders—but both were rushed into service and assigned to Cámara's squadron. The squadron