The Battle of Tuyutí was a Paraguayan offensive in the Paraguayan War targeting the Triple Alliance encampment of Tuyutí. It is considered to be the bloodiest battle ever in South America. The result of the battle was an Allied victory, which added to the Paraguayan troubles after the loss of its fleet in the Battle of Riachuelo.
Paraguayan cavalry, painting by Cándido López
Trench with Uruguayan soldiers from the 24 April Battalion at Tuyutí, taken a month after the battle. Albumen print, 1866.
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."
Pedro II, Emperor of Brazil from 1831 to 1889
Bartolomé Mitre, President of Argentina from 1862 to 1868
Venancio Flores, President of Uruguay from 1865 to 1868
Francisco Solano López, President of Paraguay from 1862 to 1870