Acre War

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Acre War (Acrean Revolution)
Memorial of the centenary of the Acrean Revolution in Rio Branco, capital of Acre
Date 1899–1903 Location Acre, Bolivia Result Brazilian victory Treaty of Petrópolis (Between Bolivia and Brazil) Valerde-Río Branco Treaty (between Brazil and Peru) Polo-Bustamante Treaty (between Peru and Bolivia) Territorial changes Integration of Acre at Brazil
Belligerents
Bolivia Supported by: United States	Republic of Acre Supported by: Brazil
Commanders and leaders
José Manuel Pando Federico Román Nicolás Callaú Bruno Racua	Gálvez Rodríguez Plácido de Castro Campos Sales Rodrigues Alves
Units involved
Bolivian Army Columna 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.