Peruvian Civil War of 1856–1858

Peruvian Civil War (1856-1858); Arequipa Revolution (1856–1858)
	Part of Peruvian civil wars and Guano Era
	; Capture of Arequipa
Date	1856–1858
Location	Peruvian coast
Result	Liberal victory; Arequipa is downgraded to a province; The liberal constitution of 1856 is repealed and replaced by the moderate constitution of 1860; The First Ecuadorian–Peruvian War begins;
Belligerents
Liberals	Conservatives
Commanders and leaders
Ramón Castilla; Miguel de San Román	Manuel de Vivanco ; Miguel Grau
Strength
Peruvian Army; 10,000-11,000 troops; three pieces of artillery; Peruvian Navy; 1 steamer	Vivanquista Army; 8,000-10,000 troops; Vivanquista Navy; three warships
Casualties and losses
5,000–6,000 killed and wounded	7,000 killed and wounded; 1,000–3,000 captured; three warships captured
	3,000 civilians killed

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.