U.S. interest in purchasing Cuba had begun long before 1898. Following the Ten Years War, American sugar interests bought up large tracts of land in Cuba. Alterations in the U.S. sugar tariff favoring home-grown beet sugar helped foment the rekindling of revolutionary fervor in 1895. By that time the U.S. had more than $50 million invested in Cuba and annual trade, mostly in sugar, was worth twice that much. Fervor for war had been growing in the United States, despite President Grover Cleveland's proclamation of neutrality on June 12, 1895. But sentiment to enter the conflict grew in the United States when General Valeriano Weyler began implementing a policy of Reconcentration that moved the population into central locations guarded by Spanish troops and placed the entire country under martial law in February 1896. By December 7, President Cleveland reversed himself declaring that the United States might intervene should Spain fail to end the crisis in Cuba. President William McKinley, inaugurated on March 4, 1897, was even more anxious to become involved, particularly after the New York Journal published a copy of a letter from Spanish Foreign Minister Enrique Dupuy de Lôme criticizing the American President on February 9, 1898. Events moved swiftly after the explosion aboard the U.S.S. Maine on February 15. On March 9, Congress passed a law allocating fifty million dollars to build up military strength. On March 28, the U.S. Naval Court of Inquiry finds that a mine blew up the Maine. On April 21 President McKinley orders a blockade of Cuba and four days later the U.S. declares war.Following its declaration of war against Spain issued on April 25, 1898, the United States added the Teller Amendment asserting that it would not attempt to exercise hegemony over Cuba. Two days later Commodore George Dewey sailed from Hong Kong with Emilio Aguinaldo on board. Fighting began in the Phillipines Islands at the Battle of Manila Bay on May 1 where Commodore George Dewey reportedly exclaimed, "You may fire when ready, Gridley," and the Spanish fleet under Rear Admiral Patricio Montojo was destroyed. However, Dewey did not have enough manpower to capture Manila so Aguinaldo's guerrillas maintained their operations until 15,000 U.S. troops arrived at the end of July. On the way, the cruiser Charleston stopped at Guam and accepted its surrender from its Spanish governor who was unaware his nation was at war. Although a peace protocol was signed by the two belligerents on August 12, Commodore Dewey and Maj. Gen. Wesley Merritt, leader of the army troops, assaulted Manila the very next day, unaware that peace had been declared.In late April, Andrew Summers Rowan made contact with Cuban General Calixto García who supplied him with maps, intelligence, and a core of rebel officers to coordinate U.S. efforts on the island. The U.S. North Atlantic Squadron left Key West for Cuba on April 22 following the frightening news that the Spanish home fleet commanded by Admiral Pascual Cervera had left Cadiz and entered Santiago, having slipped by U.S. ships commanded by William T. Sampson and Winfield Scott Schley. They arrived in Cuba in late May.War actually began for the U.S. in Cuba in June when the Marines captured Guantánamo Bay and 17,000 troops landed at Siboney and Daiquirí, east of Santiago de Cuba, the second largest city on the island. At that time Spanish troops stationed on the island included 150,000 regulars and 40,000 irregulars and volunteers while rebels inside Cuba numbered as many as 50,000. Total U.S. army strength at the time totalled 26,000, requiring the passage of the Mobilization Act of April 22 that allowed for an army of at first 125,000 volunteers (later increased to 200,000) and a regular army of 65,000. On June 22, U.S. troops landed at Daiquiri where they were joined by Calixto García and about 5,000 revolutionaries.U.S. troops attacked the San Juan heights on July 1, 1898. Dismounted troopers, including the African-American Ninth and Tenth cavalries and the Rough Riders commanded by Lt. Col. Theodore Roosevelt went up against Kettle Hill while the forces led by Brigadier General Jacob Kent charged up San Juan Hill and pushed Spanish troops further inland while inflicting 1,700 casualties. While U.S. commanders were deciding on a further course of action, Admiral Cervera left port only to be defeated by Schley. On July 16, the Spaniards agreed to the unconditional surrender of the 23,500 troops around the city. A few days later, Major General Nelson Miles sailed from Guantánamo to Puerto Rico. His forces landed near Ponce and marched to San Juan with virtually no opposition.Representatives of Spain and the United States signed a peace treaty in Paris on December 10, 1898, which established the independence of Cuba, ceded Puerto Rico and Guam to the United States, and allowed the victorious power to purchase the Philippines Islands from Spain for $20 million. The war had cost the United States $250 million and 3,000 lives, of whom 90% had perished from infectious diseases.During the 1880s and 1890s, Puerto Ricans developed many different political parties, some of which sought independence for the island while others, headquartered like their Cuban counterparts in New York, preferred to ally with the United States. Spain proclaimed the autonomy of Puerto Rico on November 25, 1897, although the news did not reach the island until January 1898 and a new government established on February 12, 1898.The Philippines too was beginning to grow restive with Spanish rule. José Rizal, a member of a wealthy mestizo family, resented that his upper mobility was limited by Spanish insistence on promoting only "pure-blooded" Spaniards. He began his political career at the University of Madrid in 1882 where he became the leader of Filipino students there. For the next ten years he traveled in Europe and wrote several novels considered seditious by Filipino and Church authorities. He returned to Manila in 1892 and founded the Liga Filipina, a political group dedicated to peaceful change. He was rapidly exiled to Mindanao. During his absence, Andrés Bonifacio founded Katipunan, dedicated to the violent overthrow of Spanish rule. On August 26, 1896, after learning that the Katipunan had been betrayed, Bonifacio issued the Grito de Balintawak, a call for Filipinos to revolt. Bonifacio was succeeded as head of the Philippine revolution by Emilio Aguinaldo y Famy, who had his predecessor arrested and executed on May 10, 1897. Aguinaldo negotiated a deal with the Spaniards who exiled him to Hong Kong with 400,000 pesos that he subsequently used to buy weapons to resume the fight.Following the liberation from Spain of mainland Latin America, Cuba was the first to initiate its own struggle for independence. During the years from 1868-1878, Cubans personified by guerrilla fighters known as mambises fought for autonomy from Spain. That war concluded with a treaty that was never enforced. In the 1890's Cubans began to agitate once again for their freedom from Spain. The moral leader of this struggle was José Martí, known as "El Apóstol," who established the Cuban Revolutionary Party on January 5, 1892 in the United States. Following the grito de Baire, the call to arms on February 24, 1895, Martí returned to Cuba and participated in the first weeks of armed struggle when he was killed on May 19, 1895.Beginning in 1492, Spain was the first European nation to sail westward across the Atlantic Ocean, explore, and colonize the Amerindian nations of the Western Hemisphere. At its greatest extent, the empire that resulted from this exploration extended from Virginia on the eastern coast of the United States south to Tierra del Fuego at the tip of South America excluding Brazil and westward to California and Alaska. Across the Pacific, it included the Philippines and other island groups. By 1825 much of this empire had fallen into other hands and in that year, Spain acknowledged the independence of its possessions in the present-day United States (then under Mexican control) and south to the tip of South America. The only remnants that remained in the empire in the Western Hemisphere were Cuba and Puerto Rico and across the Pacific in Philippines Islands, and the Carolina, Marshall, and Mariana Islands (including Guam) in Micronesia. In February two events crystallized U.S. opinion in favor of Cuban independence. First, the Spanish minister in Washington, Enrique Dupuy de Lóme, wrote a letter critical of President McKinley that fell into the hands of the Cuban junta in New York. Its publication caused a sensation, but Sagasta quickly recalled Dupuy de Lóme. A few days later, however, the Battleship Maine, which had been sent to Havana to provide a naval presence there exploded and sank, causing the death of 266 sailors. McKinley, strongly opposed to military intervention, ordered an investigation of the sinking as did Spain. The Spanish inquiry decided that an internal explosion had destroyed the vessel, but the American investigation claimed an external source.

The USS Maine mysteriously exploded on the night of Feb. 15, killing 260 crewmembers. Most died immediately, but others slowly burned to death. Lt. George Blow, who was abroad the Maine, wrote to his wife, “…the scene is still too terrible to recall, even had I the time.” The explosion had ignited the coal bunkers, quickly setting off the ship’s powder magazines, which nearly tore off the entire bow. The newspapers went wild, blaming the incident on Spanish sabotage and provocatively called for revenge, galvanizing much of the public in favor of a war. Unclear of the cause of the blast, the government urged calm and commissioned an investigation. The next month, a report conducted by the U.S. Navy determined the explosion was caused by a mine, with the Spanish the most likely culprits. American advocates for war chanted, “Remember the Maine! To Hell with Spain!” Congress authorized the president to use force and demanded Spain grant independence to Cuba. In response, Spain severed diplomatic relations and the Navy blockaded the island. The situation escalated further when Spain declared war on Apr. 24. Congress responded the next day with a declaration of its own, and McKinley reluctantly went along with it.The partial success of 1 July produced consternation in Havana. The commander in Cuba, General Ramón Blanco, ordered Cervera to leave Santiago de Cuba, fearing that the Spanish squadron would fall into American hands, to face the concentrated fire of all the American vessels outside, a certain recipe for disaster. Blanco persisted, and on 3 July Cervera made his sortie. Admiral Sampson had just left the blockade, moving east to compose differences with General Shafter. This movement left Commodore Winfield Scott Schley as the senior officer present during the naval battle. Schley had earned Sampson's distrust because of his earlier failure to blockade Cervera promptly. This concern was justified when Schley allowed his flagship to make an eccentric turn away from the exiting Spanish ships before assuming its place in the pursuit. Cervera hoped to flee west to Cienfuegos, but four of his five vessels were sunk near the entrance to the channel. The other ship was overhauled over fifty miles westward where its commander drove it upon the shore to escape sinking.This destruction of Cervera's squadron decided the war, although further fighting occurred elsewhere. Sagasta decided to capitulate at Santiago de Cuba and to inaugurate peace negotiations at an early date through the good offices of France. He also recalled a naval expedition under Admiral Manuel de la Cámara that had left Spain earlier, moving eastward through the Mediterranean Sea and the Suez Canal to relieve the garrison in the Philippines. The navy had organized a squadron to pursue Cámara, but his recall ended any requirement for it.After the Spanish forces at Santiago de Cuba capitulated on 17 July, a welcome event because the Fifth Army Corps had fallen victim to malaria, dysentery, and other tropical diseases, the Commanding General of the Army, Nelson Miles, led an expedition to Puerto Rico that landed on the south coast of that island. He sent three columns northward with orders to converge on San Juan. These movements proceeded successfully, but were ended short of the objective when word of a peace settlement reached Miles. Meanwhile the fifth Army Corps was hastily shipped to Long Island to recuperate while volunteer regiments continued the occupation of Cuba commanded by General Leonard Wood.The last military operations of the war were conducted at Manila. An expedition under Major General Wesley Merritt arrived during July and encamped north of the city. Preparations for an attack were made amidst increasing signs of opposition from Filipino insurrectos led by Emilio Aguinaldo. He had become the leader of a revolutionary outburst in 1896-1897 that had ended in a truce. He established himself in Hong Kong, and in May 1898 Commodore Dewey transported him to Manila where he set about re-energizing his movement. During the summer he succeeded in gaining control of extensive territory in Luzon, and his forces sought to seize Manila. Dewey provided some supplies, but did not recognize the government that Aguinaldo set up.Dewey hoped to avoid further hostilities at Manila. To this end he engaged in shadowy negotiations with a new Spanish governor in Manila and the Roman Catholic Bishop of the city. An agreement was reached whereby there would be a brief engagement between the Spanish and American forces followed immediately by surrender of the city, after which the Americans were to prevent Aguinaldo's troops from entering Manila. General Merritt was suspicious of this deal, but on 13 August, after the American troops moved through a line of defenses north of Manila, the Spanish garrison surrendered to Dewey. The guerrillas were denied access, and the American troops occupied the city. Continuing American failure to recognize the Aguinaldo government fostered increasing distrust.Meanwhile, negotiations between McKinley and the French ambassador in Washington, Jules Cambon, came to fruition. The string of Spanish defeats ensured that the U.S. could dictate a settlement. On 12 August, McKinley and Cambon signed a protocol that provided for Cuban independence and the cession of Puerto Rico and an island in the Marianas (Guam). It differed from the American offer of June only in that it deferred action on the Philippines to a peace conference in Paris. The cautious McKinley hoped to limit American involvement with the Philippines, but a strong current of public opinion in favor of the annexation of the entire archipelago forced the President's hand. He developed a rationale for expansion that stressed the duty of the nation and its destiny, arguing that he could discern no other acceptable course. The Spanish delegation at the peace conference was forced to accept McKinley's decision. The Treaty of Paris signed on 10 December 1898 ceded the Philippines to the U.S. in return for a sum of $25 million to pay for Spanish property in the islands.When the treaty was sent to the Senate for approval, anti-imperialist elements offered some opposition, but on 6 February 1899 the Senate accepted it by a vote of 57 to 27, only two more than the necessary two-thirds majority. Fatefully, two days before the vote, armed hostilities broke out at Manila between the American garrison and Aguinaldo's troops, the beginning of a struggle that lasted until July 1902. Although Cuba received its independence, the Platt Amendment (1902) severely limited its sovereignty and stimulated a dependent relationship that affected the evolution of Cuban society. This dependency leads some historians to maintain that the events of 1895-1898 were simply a transition (la transición) from Spanish imperialism to American imperialism. Eventually the U.S. rejected the expansion of 1898, which included the annexation of the Hawaiian Islands, canceling the Platt Amendment, granting independence to the Philippine Islands, and admitting Hawaii into the Union. The war heralded the emergence of the United States as a great power, but mostly it reflected the burgeoning national development of the nineteenth century. World War I, not the American intervention in the Cuban-Spanish struggle of 1895-1898, determined the revolutionized national security policy of the years since 1914. These policies, in keeping with American values, were decidedly anti-imperialistic in both the formal and informal meanings of the term.On December 10, 1898, the Spanish-American War ended with the signing of the Treaty of Paris, with Spain recognizing the independence of Cuba; and ceding Guam, the Philippines, parts of the West Indies, and Puerto Rico to the United States.Spain willimmediately evacuate Cuba, Porto Rico and other islands now under Spanish sovereignty in the West Indies; and to this end each Government will, within ten days after the signing of this protocol, appoint Commissioners, and the Commissioners so appointed shall, within thirty days after the signing of this protocol, meet at Havana for the purpose of arranging and carrying out the details of the aforesaid evacuation of Cuba and the adjacent Spanish islands; and each Government will, within ten days after the signing of this protocol, also appoint other Commissioners, who shall, within thirty days after the signing of this protocol, meet at San Juan, in Porto Rico, for the purpose of arranging and carrying out the details of the aforesaid evacuation of Porto-Rico and other islands now under Spanish sovereignty in the West Indies.