# List of wars involving Brazil

This is a list of wars involving the Federative Republic of Brazil and its predecessor states, starting from 1815, when Brazil was elevated to a kingdom within the United Kingdom of Portugal, Brazil, and the Algarves, up to the present day.

## United Kingdom of Portugal, Brazil and the Algarves (1815–1822)

| Conflict | Combatant 1 | Combatant 2 | Result | King |
| Portuguese conquest of the Banda Oriental (1816–1820) | Portugal, Brazil and the Algarves | Federal League  Entre Ríos Misiones Corrientes Santa Fe Córdoba | Victory Annexation of the Banda Oriental. | John VI |

## Empire of Brazil (1822–1889)

| Conflict | Combatant 1 | Combatant 2 | Result | Emperor |
| Brazilian War of Independence (1822–1825) | Brazil | Portugal | Victory Treaty of Rio de Janeiro (1825) | Pedro I |
| Confederation of the Equator (1824) | Brazil | Confederates | Loyalist victory Execution of confederate leader Frei Caneca. | Pedro I |
| Cisplatine War (1825–1828) | Brazil | United Provinces Thirty-Three Orientals | Stalemate Preliminary Peace Convention | Pedro I |
| Cabanagem (1835–1840) | Brazil | Rebels | Loyalist victory Devastation of the economy of Grão-Pará Province; Death of roughly 20% of the population in the province. | Pedro II |
| Ragamuffin War (1835–1845) | Brazil | Riograndense Republic Juliana Republic | Loyalist victory Treaty of Poncho Verde | Pedro II |
| Sabinada (1837–1838) | Brazil | Bahia Republic | Loyalist victory Revolt suppressed. | Pedro II |
| Platine War (1851–1852) | Brazil Defense Government Entre Ríos Corrientes Santa Fe | Argentina Cerrito Government Federalists | Victory End of Juan Manuel de Rosas' government; Emergence of Brazil as the hegemonic power in the Platine region. | Pedro II |
| Uruguayan War (1864–1865) | Brazil Colorados Unitarians Argentina | Uruguay Blancos FederalistsSupported by: Paraguay | Victory Takeover of the Uruguayan government by the Colorado Party; Invasion of Brazilian and Argentine provinces by Paraguay, prompting the start of the Paraguayan War. | Pedro II |
| Paraguayan War (1864–1870) | Brazil Argentina Uruguay | Paraguay | Victory Loizaga–Cotegipe Treaty | Pedro II |

## Brazilian Republic (1889–)

| Conflict | Combatant 1 | Combatant 2 | Result | President |
| Federalist Revolution (1893–1895) | Brazilian government  Rio Grande do Sul | Federalists Navy mutineers | Government victory Permanence of Júlio de Castilhos as governor of Rio Grande do Sul. | Floriano Peixoto |
| War of Canudos (1896–1897) | Brazilian government | Canudos inhabitants | Government victory Total destruction of Canudos; Death of most of the population in the settlement. | Prudente de Morais |
| Acre War (1899–1903) | Republic of AcreSupported by: Brazil Amazonas | Bolivia | Victory Treaty of Petrópolis | Campos Sales Rodrigues Alves |
| Contestado War (1912–1916) | Brazilian government  Paraná Santa Catarina | Rebels | Government victory Revolt suppressed. | Hermes da Fonseca |
| Contestado War (1912–1916) | Brazilian government  Paraná Santa Catarina | Rebels | Government victory Revolt suppressed. | Venceslau Brás |
| First World War (1914–1918) (Limited involvement, 1917–1918) | France United Kingdom Russia United States Italy Japan Brazil and others | Germany Austria-Hungary Ottoman Empire Bulgaria and others | Victory Fall of the German, Austro-Hungarian, and Ottoman empires; Formation of new countries in Europe and the Middle East; Transfer of German colonies and regions of the former Ottoman Empire to other powers; Establishment of the League of Nations, which led to the creation of the United Nations. | Venceslau Brás |
| Constitutionalist Revolution (1932) | Brazilian government | Constitutionalists  São Paulo Maracaju Frente Única Gaúcha | Government military victory Surrender of the revolutionary forces; Promulgation of a new constitution, the main goal of the uprising, in 1934. | Getúlio Vargas |
| Second World War (1939–1945) (Limited involvement, 1942–1945) | United States Soviet Union United Kingdom China Brazil and others | Germany Italy Japan and others | Victory Collapse of Nazi Germany and fall of the Italian and Japanese empires; Creation of the United Nations; Emergence of the United States and the Soviet Union as superpowers; Beginning of the Cold War. | Getúlio Vargas |
| Dominican Civil War (1965) | Loyalists United States IAPF Brazil  Paraguay  Nicaragua  Costa Rica  El Salvador  Honduras | Constitutionalists | Victory Deposition of Juan Bosch; Election of Joaquín Balaguer as the new president of the Dominican Republic. | Humberto Castelo Branco |