| Date: | 1835–1836 |
| Place: | Peru |
| Result: | Victory of President Orbegoso
|
| Combatant1: | Pro-Confederation: (Liberals) Orbegosistas Santa Crucistas Supported by: British Empire  FranceRepublic of Iquicha  Pipiolos |
| Combatant2: | Anti-Confederation: (Conservatives) Salaverristas Gamarristas Supported by: Argentina Chile SpainLimeños and Arequipeños |
| Commander1: | Luis Jose de Orbegoso Andres de Santa Cruz José Miguel de Velasco Franco José Trinidad Morán Anselmo Quiroz Francisco Anglada Blas Cerdeña José Ballivián Otto Philipp Braun Francisco Burdett O'Connor |
| Commander2: | Felipe Salaverry José Quiroga Juan Bautista Eléspuru Juan Pablo Fernandini Manuel Ignacio de Vivanco Manuel de Mendiburu Carlos García del Postigo Agustín Gamarra |
| Strength1: | 5,000 |
| Strength2: | 3,500 (Salaverry's forces) 12,000 (Gamarra's forces) |
The Salaverry-Santa Cruz War, sometimes called the Peruvian Civil War of 1835–1836, was an internal conflict in Peru with the involvement of the Bolivian army of Andres de Santa Cruz. It ended with the defeat and execution of Felipe Santiago Salaverry and the creation of the Peru-Bolivian Confederation.
In 1834, a civil war had been fought between Pedro Pablo Bermúdez and Agustín Gamarra on the one hand against Luis José de Orbegoso and Felipe Salaverry on the other hand. The war was won by the constitutional President Luis José de Orbegoso.
In 1835, while President Luis Orbegoso was travelling to the south, his former ally General Felipe Salaverry proclaimed himself Supreme Head of the Republic on 23 February 1835, deposing Orbegoso. Orbegoso fled to Bolivia and asked Andrés de Santa Cruz, president of Bolivia, for his support to overthrow the Salaverry government.
Santa Cruz was alarmed by Salaverry's coup, who also received the support of his former enemy General Agustín Gamarra. Santa Cruz agreed to invade Peru to overthrow them, since Orbegoso would not be able to confront Salaverry and Gamarra alone.
There were 4 major battles in this war:
After the civil war was won, Santa Cruz and Orbegoso merged their two countries into the Peru–Bolivian Confederation. This alarmed neighboring countries Chile and Argentina and led to the War of the Confederation and Tarija War. After defeat in War of the Confederation and growing internal resistance by Conservative factions in Peru, the Peru–Bolivian Confederation was dissolved in 1839.