Back Guerra del Acre AST Akri müharibəsi Azerbaijani আকরের যুদ্ধ Bengali/Bangla Guerra de l'Acre Catalan Guerra del Acre Spanish Acre guda Basque Guerre de l'Acre French Ակրիի պատերազմ Armenian Guerra dell'Acre Italian アクレ紛争 Japanese
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| Acre War (Acrean Revolution) | |||||||||
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 Memorial of the centenary of the Acrean Revolution in Rio Branco, capital of Acre | |||||||||
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| Belligerents | |||||||||
 BoliviaSupported by:  United States |
 Republic of Acre Supported by:  Brazil | ||||||||
| Commanders and leaders | |||||||||
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José Manuel Pando Federico Román Nicolás Callaú Bruno Racua |
Gálvez Rodríguez Plácido de Castro Campos Sales Rodrigues Alves | ||||||||
| Units involved | |||||||||
 Bolivian ArmyColumna Porvenir (militia) |
Acrean tappers Civil militia Support: Brazilian Army | ||||||||
| Casualties and losses | |||||||||
| Unknown | Unknown | ||||||||
The Acre War, known in Brazil as Acrean Revolution (Portuguese: Revolução Acreana) and in Spanish as Guerra del Acre ("War of the Acre") was a border conflict between Bolivia and Brazil over the Acre Region, which was rich in rubber and gold deposits. The conflict had two phases between 1899 and 1903 and ended with an Acrean victory and the subsequent Treaty of Petrópolis, which ceded Acre to Brazil. The outcome also affected territories disputed with Peru.