The Peruvian Civil War of 1856–1858, also known as the Arequipa Revolution of 1856, was one of the largest and most violent in Peru. It was the third internal conflict in 19th century Peru (after the Peruvian Civil War of 1834 and Peruvian Civil War of 1843–1844). It was fought between the Conservatives (supporters of Ramón Castilla) and the Liberals (who opposed Castilla). It followed the Peruvian Liberal Revolution of 1854. 3,000 people were killed on both sides.
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