The War of the Pacific (1879–1884) and the Sino-French War (1883–1885) put the Pacific’s newly made navies to the test after a decade of naval racing. These two wars are rarely compared, despite occurring more or less contemporaneously and employing many of the same technologies. In the War of the Pacific, Chilean victory transformed the Chilean Navy into the “preponderant force in South America.” As a hemispheric matter, the Chilean newly made navy also became a credible danger to the “Old Steam Navy” and soon the US “New Navy’s” nearest pacing threat. Strategic defeat in the Sino-French War masked Chinese tactical successes that would guide the Qing Empire’s self-strengthening efforts in the coming decades. Defeat was not a refutation but rather confirmation of the need to cultivate an effective navy, spurring on the expansion of the Beiyang Fleet until it became the dominant power in Northeast Asia by the early 1890s. In an era of vicious anti-Chinese racism in the United States, the Qing’s possession of a modern navy created debate and cultural anxiety in California.

The War of the Pacific (1879-1884) is the war among South American states with the second highest casualty rate in the nineteenth century. This chapter provides a detailed case study of this war while offering a long-term narrative of state building in the South Pacific (i.e., Bolivia, Chile, and Peru). The comparison between Chile and Peru is illuminating, since both countries were comparable in important confounders–e.g., their armies, navy, bureaucracies, and budgets–and were impacted similarly by important economic confounders such as economic booms and crises. In this chapter I depict the evolution of war and the balance between central and peripheral elites from independence to the mid-century. Then I illustrate how preparation for war led to state formation, and looks at the details of the campaign, battle by battle. These two sections already serve the purpose of debunking some myths in this literature, like the idea that Peru did not mobilize for the war, and that the war did not lead to extraction in Chile Finally, I discuss how war transformed state institutions, and determined diverging, long-terms trends in state capacity.

Following the Civil War, the United States exerted its diplomatic, economic, and military leverage to pursue economic and political interests in Latin America, as it believed that what was good for business was good for the country. The emphasis on national security had not disappeared, but the threats to U.S. borders were less dire than in the past as European countries were generally easing themselves out of the region. Latin American leaders had neither the unified political support nor the military strength required to counter U.S. influence. While certain Latin American policy makers resisted U.S. hegemony, both politically and militarily, others welcomed it. Political and economic elites out of power appealed to the United States for assistance because they believed it could provide stability and wealth. The United States stepped neatly and easily into this political maelstrom. The chapter concludes at the turn of the twentieth century, when the era of intervention began in earnest.