# List of wars involving Bulgaria

This article lists the wars, campaigns and battles involving Bulgaria since its establishment around 680.
    Victory of Bulgaria (and allies)
    Defeat of Bulgaria (and allies)
    Another result*
*e.g. result unknown or indecisive/inconclusive, result of internal conflict inside Bulgaria, status quo ante bellum, or a treaty or peace without a clear result.

## First Bulgarian Empire (680–1018)

| Conflict | Combatant 1 | Combatant 2 | Result |
| First Bulgarian-Byzantine War (680-792) | Bulgarian Empire | Byzantine Empire | Victory Formation and expansion of the First Bulgarian Empire |
| Siege of Constantinople (717–718) | Bulgarian Empire | Umayyad Caliphate | Victory |
| First Bulgarian-Serbian War (839-842) | Bulgarian Empire | Serbian Principality | Defeat |
| Second Bulgarian-Serbian War 853 | Bulgarian Empire | Serbian Principality | Defeat |
| First Bulgarian-Croatian War (854) | Bulgarian Empire | Croatian Kingdom | Draw Bulgarian retreat, peace treaty concluded |
| Third Bulgarian-Byzantine War (894-896) | Bulgarian Empire | Byzantine Empire | Victory Expansion of the Bulgarian Empire |
| Invasion of the Principality of Serbia by the pretender to the Serbian throne Klonimir backed by the Bulgarian Empire (897-898) | Bulgarian Empire Klonimir | Serbian Principality | Defeat Rebellion supported by Tsar Simeon was defeated, resulting in the death of Klonimir Truce between the Principality of Serbia and the Bulgarian Empire and the recognition of Petar Gojniković as a rightful ruler of Serbia |
| Fourth Bulgarian-Byzantine War (913-927) | Bulgarian Empire | Byzantine Empire | Victory Bulgarian Empire nearly conquered Constantinople |
| Third Bulgarian-Serbian War (917-924) | Bulgarian Empire | Serbian Principality Byzantine Empire | Victory Serbia is conquered by Emperor Simeon and Bulgaria for the first time |
| Second Bulgarian-Croatian War (926) | Bulgarian Empire | Croatian Kingdom | Defeat |
| Liberation of the Principality of Serbia from the Bulgar rule (933-934) | Bulgarian Empire | Serbian Principality | Defeat Prince Česlav, with a small group of followers, takes possession of the Serbian Principality and submits to the overlordship of Byzantine emperor Romanos I Lekapenos |
| Sviatoslav's invasion of Bulgaria (967-971) | Bulgarian Empire | Kievan Rus' Byzantine Empire | Draw Kievan Rus' conquered areas of northern Bulgaria Byzantine victory over Kievan Rus', formal annexation of Bulgaria. |
| Fifth Bulgarian-Byzantine War (968-1018) | Bulgarian Empire | Byzantine Empire | Defeat Dissolution of the First Bulgarian Empire Kingdom of Duklja became last remaining region left unconquered |
| Bulgarian invasion of Duklja (997) | Bulgarian Empire | Duklja | Victory The Bulgarian Empire conquers Duklja and installs Jovan Vladimir as their vassal |
| Third Bulgarian-Croatian War (997-1000) | Bulgarian Empire | Croatian Kingdom | Defeat |

## Second Bulgarian Empire (1185–1396)

| Conflict | Combatant 1 | Combatant 2 | Result |
| Seventh Bulgarian-Byzantine War (1185-1201) | Bulgarian Empire | Byzantine Empire | Victory Reestablishment of the Bulgarian Empire Bulgarian Empire resurfaces as a great power in Eastern Europe |
| Fourth Bulgarian-Serbian War (1202-1203) | Bulgarian Empire | Serbian Principality | Victory The Bulgarian Empire under king Kaloyan pushes Serbia to the west |
| First Bulgarian–Latin War (1204-1208) | Bulgarian Empire | Latin Empire | Victory Weakening of the Latin Empire and enlargement of the Bulgarian Empire |
| Battle of Klokotnitsa (1230) | Bulgarian Empire | Empire of Thessalonica | Victory Empire of Thessalonica conquered by Bulgaria Thessaly and Epirus became vassals of the Bulgarian empire Bulgaria emerged as pre-eminent power in Southeastern Europe |
| Mongol invasion of Bulgaria and Serbia (1241) | Bulgarian Empire | Golden Horde | Victory Bulgarian army pushed back Batu Khan's forces |
| Bulgarian Civil War (1277–1280) | Bulgarian Empire Tsar Constantine Allies: Byzantine Empire Golden Horde | Bulgarian Empire Tsar Ivaylo Allies: Bulgarian rebels | Royal victory Peasant Ivaylo seized the throne, killing the Bulgarian tsar Ivaylo was murdered, George Terter I became emperor of Bulgaria |
| Fifth Bulgarian-Serbian War (1290-1291) | Bulgarian Empire | Serbian Kingdom | Defeat Bulgaria lost the Belgrade and Branicevo provinces. |
| Fourth Bulgarian-Mongol War (1299-1300) | Bulgarian Empire | Golden Horde | Victory Tsar Theodore Svetoslav expelled the Mongols to the east |
| Ninth Bulgarian-Byzantine War (1304-1305) | Bulgarian Empire | Byzantine Empire | Victory Bulgarian Empire conquered most of Thrace |
| Battle of Velbazhd (1330) | Bulgarian Empire | Serbian Kingdom | Defeat |
| Byzantine Civil War (1341–1347) | Byzantine Empire John V Palaiologos Allies: Bulgarian Empire Serbian Empire | Byzantine Empire John VI Kantakouzenos Allies: Serbian Empire Ottoman Empire | Victory Kantakouzenos defeated regents, became emperor Bulgarian Empire gained northern Thrace |
| First Bulgarian–Ottoman War (1344-1371) | Bulgarian Empire | Ottoman Empire | Defeat Ottoman advance to Sofia halted in 1349 and 1355 Bulgarian phyrric victory over Ottomans at Çamurli field in 1371 Bulgaria held off the Ottoman army until the Bulgarian betrayal of brothers |
| Second Bulgarian–Ottoman War (1371-1396) | Bulgarian Empire | Ottoman Empire | Defeat Fall of the Bulgarian Empire |

## Principality of Bulgaria (1876–1908)

| Conflict | Combatant 1 | Combatant 2 | Result |
| Russo-Turkish War (1877–1878) | Russian Empire Principality of Bulgaria Principality of Serbia Romanian United Principalities Principality of Montenegro | Ottoman Empire | Victory Treaty of San Stefano Treaty of Berlin Ottoman Empire suffered severe defeat, losing key holdings in Europe Independence of Bulgaria, Romania, Serbia and Montenegro |
| Bulgarian-Serbian War (1885) | Principality of Bulgaria | Kingdom of Serbia | Victory Serbia unexpectedly attacked former ally Bulgaria Prince Alexander of Battenburg led Bulgaria to victory |
| Macedonian Struggle (1893–1908) | Principality of Bulgaria | Kingdom of Greece Kingdom of Serbia Kingdom of Romania Ottoman Empire | Draw Four-way war between Bulgaria, Serbia, Greece, Romania and the Ottoman Empire Inconclusive result after Young Turk Revolution Bulgaria gained full independence in 1908 |

## Kingdom of Bulgaria (1908–1946)

| Conflict | Combatant 1 | Combatant 2 | Result |
| First Balkan War (1912–1913) | Balkan League Kingdom of Bulgaria Kingdom of Greece Kingdom of Serbia Kingdom of Montenegro | Ottoman Empire Allies: Austria-Hungary Albanian irregulars | Balkan League victory Ottoman Empire lost most remaining holdings in Europe Bulgaria obtained control over Macedonia, northern Greece, Albania and south Serbia Treaty of London |
| Second Balkan War (1913) | Kingdom of Bulgaria | Kingdom of Greece Kingdom of Serbia Kingdom of Romania Kingdom of Montenegro Ottoman Empire | Defeat Dissatisfied with gains from the First Balkan War, Bulgaria attacked former allies Serbia and Greece Attacks repulsed by Greece and Serbia, whose armies enter Bulgaria Romanian and Ottoman intervention forced Bulgaria to ask for armistice Bulgarian territorial cessations in Treaty of Bucharest and Treaty of Constantinople |
| World War I (1914–1918) (see Bulgaria during World War I) | Central Powers: German Empire Ottoman Empire Austria-Hungary Kingdom of Bulgaria (from 1915) | Allied Powers: United States Britain Kingdom of Italy Russian Empire French Third Republic Occupied by Central Powers: Kingdom of Greece Kingdom of Serbia Kingdom of Romania | Allied victory Treaty of Neuilly-sur-Seine resulted in Bulgarian territorial cessations |
| Incident at Petrich (1925) | Kingdom of Bulgaria | Kingdom of Greece | Bulgarian diplomatic victory Due to a border incident, Greek dictator Theodoros Pangalos sent troops into Bulgaria League of Nations brokered ceasefire and Greek withdrawal Greece fined for violating Bulgarian territory Bulgaria paid damages for shooting Greek soldiers |
| World War II (1941–1945) (see Bulgaria during World War II) | Allied Powers: Soviet Union United States United Kingdom Kingdom of Italy (1943–45) French Third Republic (1939–40) Free France Kingdom of Romania (1944–45) Kingdom of Bulgaria (1944–45) Kingdom of Greece (1940–45) Kingdom of Yugoslavia (1941) | Axis Powers: Nazi Germany Empire of Japan Kingdom of Italy (1939–43) Italian Social Republic (1943–45) Vichy France Independent State of Croatia Kingdom of Romania (1941–44) Kingdom of Bulgaria (1941–44) | Allied victory Bulgarian monarchy abolished and replaced with communist government Southern Dobruja ceded to Bulgaria post-war |

## People's Republic of Bulgaria (1946–1990)

| Conflict | Combatant 1 | Combatant 2 | Result |
| Warsaw Pact invasion of Czechoslovakia (1968) | Warsaw Pact: Soviet Union Poland Bulgaria Hungary Logistics support: East Germany | Czechoslovakia Supported by: Albania  Romania | Warsaw Pact victory Warsaw Pact allies including Bulgaria invaded Czechoslovakia Minimal Czechoslovak armed resistance Czech reformist leaders forced to sign Moscow Protocol, ending the Prague Spring |

## Republic of Bulgaria (1990–)

| Conflict | Combatant 1 | Combatant 2 | Result |
| Iraq War (2003-2011) | Iraq NATO  United States  Bulgaria other allies | Baath Loyalists Islamic State of Iraq Al-Qaeda Islamic Army of Iraq Ba'athist Iraq | Coalition victory Part of the Iraqi Insurgency and War on Terror Invasion and occupation of Iraq Defeat of Ba'ath Party government and execution of Saddam Hussein Iraqi insurgency, emergence of al-Qaeda in Iraq, and civil war Subsequent depletion of Iraqi insurgency, improvements in public security Establishment of democratic elections and formation of new Shia led government. U.S.–Iraq Status of Forces Agreement Withdrawal of U.S. forces from Iraq War on ISIL Iraqi Civil War |
| 2011 military intervention in Libya | NATO  United States  Bulgaria (one frigate as part of NATO contribution) other allies | Libya | NATO victory NTC assumed interim control of Libya. Civil war in Libya |