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Bolívar declares war on Peru, opening the Gran Colombia–Peru War

When
1828
Where
Unknown
Episodes
2

In June 1828, President Simón Bolívar of Gran Colombia resolved to declare war on Peru following the expulsion of Colombian forces from Bolivia. This diplomatic breakdown led to mobilizations by both nations, marking the first international conflict for Peru and Gran Colombia.

Episodes

  1. 3 June 1828 · UnknownBolívar Declares War on Peru

    Following the expulsion of Colombian forces from Bolivia, President Bolívar resolved to declare war against Peru on 3 June 1828.

  2. 3 July 1828 · UnknownMobilization of Forces

    On 3 July 1828, Presidents La Mar and Bolívar ordered mobilizations of their land and naval forces.

Background and detail

Background. Peru launched a campaign against Bolivia in early 1828 to end Bolivarian influence, forcing Colombians to leave. Bolívar, furious at the expulsion, resolved to declare war. The conflict involved disputed territories, including Cuenca, which was part of Gran Colombia in 1828.

Declaration of War. President Bolívar resolved to declare war against Peru on 3 June 1828. The formal declaration occurred on 3 July 1828, when President José de La Mar and President Bolívar ordered mobilizations of their land and naval forces.

Key Figures. Simón Bolívar, President of Gran Colombia, and José de La Mar, President of Peru, were the primary leaders. Antonio José de Sucre, former President of Bolivia, resigned under duress and became Commander of the Gran Colombian Army.

People involved

Sources

  1. Gran Colombia–Peru War Wikipedia, revision of 2026-09-17

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.