The Peruvian Civil War of 1867 was the fifth internal conflict in 19th century Peru. It was caused the adoption of a new constitution to replace the previous one adopted in 1860. Mariano Ignacio Prado, put in power as a result of the Peruvian civil war of 1865, faced by a revolt by his former allies Pedro Diez Canseco and José Balta. On May 30, 1867, former president Ramon Castilla died while attempting to take advantage of the situation.