Peter V. N. Henderson
While Europeans basked in the glory of their so-called century of peace between the end of the Napoleonic wars (1815) and the onset of World War I (1914), Latin Americans knew no such luxury. Conflict became a way of life for Latin Americans attempting to construct nation-states. Liberals and Conservatives dueled with one another for political power, while caudillos (military strongmen) added their unique twisted logic to the political process. Historians have spilled considerable ink detailing these internal conflicts that complicated Latin America’s struggle for effective state formation in the early national period but have paid much less attention to the external wars over disputed boundaries that involved every South American nation during the 19th century. As historian Robert Burr described it: boundary conflicts were the “congenital international disease of Spain’s former colonies.”
In 1863 and 1864, historical and political contradictions in the River Plate region led to civil war in Uruguay, creating tensions with neighboring nations in the region. The Brazilian government intervened both politically and militarily in Uruguay to address the interests of ranchers in its province of Rio Grande do Sul, to distract the attention of the Brazilian citizens from domestic problems, and to preserve the political influence of the Empire of Brazil on Uruguay. This action by the Empire clashed with the new Paraguayan policy of political interference in the River Plate region and resulted in the declaration of war against Brazil by Paraguayan dictator Francisco Solano López. This conflict broadened into the Paraguayan War.