The War of the Pacific (1879-1884)

Introduction: the Saltpeter War and Its Enduring Legacies

In the annals of South American history, few conflicts have reshaped the political map of the continent as profoundly as the War of the Pacific, fought between Chile on one side and the allied nations of Peru and Bolivia on the other from 1879 to 1884. Known variously as the Saltpeter War, the Guano War, or simply La Guerra del Pacífico, this conflict determined the fate of vast mineral-rich territories in the Atacama Desert, created a landlocked Bolivia that persists to this day, and established Chilean hegemony along the Pacific coast of South America for generations.

The War of the Pacific was, at its root, a conflict over extraordinary mineral wealth. The Atacama Desert, one of the driest places on Earth, contained beneath its arid surface and along its coastal deposits some of the world's richest concentrations of sodium nitrate, known as saltpeter or salitre. In the second half of the nineteenth century, before the synthesis of artificial fertilizers, sodium nitrate from the Atacama was essential to the agriculture of Europe and North America. It was also a critical component in the manufacture of gunpowder and explosives. Control of the nitrate fields meant control of an economic resource of extraordinary and growing importance.

The three nations that went to war over these territories in 1879 were at very different stages of political and economic development. Chile, under the conservative governments that had ruled since 1831, had achieved a remarkable degree of political stability for a Latin American nation of the era. Its army was disciplined and relatively well-equipped, its finances were among the soundest in the region, and its political class was capable of sustaining a prolonged military effort. Peru, by contrast, had experienced decades of political turbulence since independence, and while its navy was formidable, its army was poorly organized and its finances were burdened by debts from previous conflicts and unwise fiscal policies. Bolivia, the least developed of the three, had an army that was more political than military in character, underpaid and poorly trained, and a government that lurched from crisis to crisis.

The war unfolded in several distinct phases. A brief naval campaign in 1879 established Chilean maritime dominance along the Pacific coast, a crucial achievement that made all subsequent land operations possible. Land campaigns in 1879 and 1880 swept Chilean forces through the Atacama provinces of Tarapacá, Tacna, and Arica, driving Bolivian forces from the conflict and stripping Peru of its richest nitrate-producing regions. A massive amphibious operation in late 1880 and early 1881 brought the war to Lima itself, resulting in the occupation of the Peruvian capital by Chilean troops. The war then entered a long and grinding guerrilla phase as Peru struggled to organize resistance under the leadership of regional caudillos while Chile attempted to impose a peace settlement that would ratify its territorial conquests.

The consequences of Chilean victory were transformative. Peru lost its entire southern province of Tarapacá and was subjected to occupation and humiliation that scarred the national psyche for generations. Bolivia lost its entire Pacific coast, a blow that transformed it into the only South American nation without sea access and created a grievance that remained raw and politically powerful into the twenty-first century. Chile became the dominant power on the Pacific coast of South America, enriched by the nitrate revenues that flowed from its new territories for decades.

This article examines the War of the Pacific in its full complexity: the economic and geopolitical forces that made it almost inevitable, the military campaigns that determined its outcome, the human costs that were borne by soldiers and civilians on all sides, and the long shadow that the conflict has cast over the politics and identities of Chile, Peru, and Bolivia in the century and a half since its conclusion.