List of wars involving Costa Rica

This is a list of wars involving the Republic of Costa Rica.

  Costa Rican military victory

  Costa Rican military defeat

  Indecisive or unclear outcome

  Ongoing conflict

Conflict	Combatant 1	Combatant 2	Results
Ochomogo War (1823)	Republicans	Imperialists	Republican victory
Zamora's Conspiracy (1826)	Costa Rica	Royalist conspirators	Victory Decisive victory of the Republican government. Execution of José Zamora and defeat of the counter-revolution.
League War (1835)	San José	Alajuela Cartago Heredia	Josefine victory San Jose is later made Costa Rica's Capital.
Invasion of Guanacaste (1836)	Costa Rica	Nicaragua Costa Ricans exiled	Victory
Alajuela Uprising (1842)	Army of the United Towns San José Alajuela Heredia Cartago (from Sept. 13)	Protective Allied Army of the Law Morazanist Forces Cartago	Victory of the United Towns Overthrow and execution of Francisco Morazán. Antonio Pinto Soares assumes temporary leadership.
Filibuster War (1855–1857)	Allied Central American Army Nicaragua Costa Rica El Salvador Guatemala Honduras Legitimist Party	Filibusters Walker's Nicaragua Democratic Party	Central American alliance victory
Battle of La Angostura (1860)	Costa Rica	Morist Rebels	Government victory Defeat of the Morist attempt to regain power. Execution of Juan Rafael Mora
Federico Mora's Expedition (1878)	Costa Rica	Morist Rebel Forces Nicaraguan Deserters	Government victory Defeat of the rebel incursion in the Atlantic region.
Barrios' War of Reunification (1885)	El Salvador Mexico Costa Rica Nicaragua	Guatemala Honduras	Anti-Barrios victory Failure to reunify Central America Death of Justo Rufino Barrios
World War I (1918)	Allied Powers: France United Kingdom  and Empire: Australia Canada Ceylon Egypt Newfoundland New Zealand India South Africa Russia (until 1917) Italy (from 1915) United States (from 1917) Japan Costa Rica and others ...	Central Powers: Germany Austria-Hungary Ottoman Empire Bulgaria (from 1915) and others ...	Allied Powers victory
Sapoá Revolution (1919)	Government of Costa Rica	Costa Rican Rebels Nicaraguan Volunteers	Government victory Failure of the rebel incursion. The dictatorship falls months later due to internal pressure.
Coto War (1921)	Costa Rica	Panama	Victory Panama ceded Coto to Costa Rica
World War II (1941–1945)	United States Soviet Union United Kingdom China France Poland Canada Australia New Zealand India South Africa Yugoslavia Greece Denmark Norway Netherlands Belgium Luxembourg Czechoslovakia Brazil Mexico Panama Costa Rica El Salvador Guatemala Honduras Nicaragua Dominican Republic Cuba	Germany Japan Italy Hungary Romania Bulgaria Croatia Slovak Republic (1939–1945) Thailand Manchukuo Mengjiang	Victory
Costa Rican Civil War (1948)	Government of Costa Rica Calderon forces People's Vanguard Party Nicaraguan National Guard	National Liberation Army Ulatista Forces Caribbean Legion Supported by: Guatemala United States	Rebel victory Overthrow of president Teodoro Picado Michalski Costa Rican military abolished
Calderonista invasion of Costa Rica (1955)	Costa Rica Supported by: United States Organization of American States	Calderón forces Supported by: Nicaragua Venezuela Dominican Republic	Costa Rican government victory
Dominican Civil War (1965)	Loyalist faction United States IAPF Brazil Paraguay Nicaragua Costa Rica El Salvador Honduras	Constitutionalist faction	Loyalist victory