Joaquim José Inácio, Viscount of Inhaúma, was a naval officer, politician and monarchist of the Empire of Brazil. He was born in the Kingdom of Portugal, and his family moved to Brazil two years later. After Brazilian independence in 1822, Inhaúma enlisted in the Brazilian navy. Early in his career during the latter half of the 1820s, he participated in the subduing of secessionist rebellions: first the Confederation of the Equator, and then the Cisplatine War, which precipitated a long international armed conflict with the United Provinces of the Río de la Plata.

The Paraguayan War, also known as the War of the Triple Alliance, was a South American war that lasted from 1864 to 1870. It was fought between Paraguay and the Triple Alliance of Argentina, the Empire of Brazil, and Uruguay. It was the deadliest and bloodiest inter-state war in Latin American history. Paraguay sustained large casualties, but the approximate numbers are disputed. Paraguay was forced to cede disputed territory to Argentina and Brazil. The war began in late 1864, as a result of a conflict between Paraguay and Brazil caused by the Uruguayan War. Argentina and Uruguay entered the war against Paraguay in 1865, and it then became known as the "War of the Triple Alliance."