Revolution breaks out in Baire, a town near Santiago de Cuba, beginning the Cuban War of Independence; the war ends along with the Spanish–American War in 1898.

In political science, a revolution is a rapid, fundamental transformation of a society's class, state, ethnic or religious structures. According to sociologist Jack Goldstone, all revolutions contain "a common set of elements at their core: (a) efforts to change the political regime that draw on a competing vision of a just order, (b) a notable degree of informal or formal mass mobilization, and (c) efforts to force change through noninstitutionalized actions such as mass demonstrations, protests, strikes, or violence."

Santiago de Cuba is the second-largest city in Cuba and the capital city of Santiago de Cuba Province. It lies in the southeastern area of the island, some 870 km (540 mi) southeast of the Cuban capital of Havana.

The Cuban War of Independence, also known in Cuba as the Necessary War, fought from 1895 to 1898, was the last of three liberation wars that Cuba fought against Spain, the other two being the Ten Years' War (1868–1878) and the Little War (1879–1880). During the war, Spain sent 220,285 soldiers to Cuba—according to the Library of Congress, the largest army to cross the Atlantic until World War II. The final three months of the conflict escalated to become the Spanish–American War, with United States forces being deployed in Cuba, Puerto Rico, and the Philippines against Spain. Historians disagree as to the extent that United States officials were motivated to intervene for humanitarian reasons but agree that yellow journalism exaggerated atrocities attributed to Spanish forces against Cuban civilians.

The Spanish–American War was fought between Spain and the United States in 1898. It began with the sinking of the USS Maine in Havana Harbor in Cuba, and resulted in the U.S. acquiring sovereignty over Puerto Rico, Guam, and the Philippines, and establishing a protectorate over Cuba. It represented U.S. intervention in the Cuban War of Independence and Philippine Revolution, with the latter later leading to the Philippine–American War. The Spanish–American War brought an end to almost four centuries of Spanish presence in the Americas, Asia, and the Pacific; the United States meanwhile not only became a major world power, but also gained several island possessions spanning the globe, which provoked rancorous debate over the wisdom of expansionism.