Wars and conflicts

World War II 56 countries World War I 41 countries Iraq War 39 countries Korean War 20 countries Kosovo War 18 countries War in Afghanistan (2001-2021) 17 countries Napoleonic Wars 16 countries Gulf War 15 countries Third Indochina War 12 countries Vietnam War 12 countries Seven Years' War 11 countries Thirty Years' War 11 countries Second Congo War 10 countries Syrian Civil War 10 countries Indochina Wars 9 countries War in Afghanistan (2001–2021) 9 countries Balkan Wars 8 countries First Libyan Civil War 8 countries Yom Kippur War 8 countries Yugoslav Wars 8 countries Insurgency in the Maghreb 7 countries War in Afghanistan (2015–2021) 7 countries Angolan Civil War 6 countries Greek War of Independence 6 countries Six-Day War 6 countries Spanish Civil War 6 countries American Revolutionary War 5 countries Crimean War 5 countries Hundred Years' War 5 countries Iran–Iraq War 5 countries Rwandan genocide 5 countries Second Boer War 5 countries Second Sino-Japanese War 5 countries Tajikistani Civil War 5 countries War of Attrition 5 countries Cambodian-Vietnamese War 4 countries Chincha Islands War 4 countries First Congo War 4 countries Gran Colombia-Peru War 4 countries Indo-Pakistani wars and conflicts 4 countries Iran-Iraq War 4 countries Kivu conflict 4 countries Lord's Resistance Army insurgency 4 countries Paraguayan War 4 countries Republic of the Congo civil war 4 countries Russo-Japanese War 4 countries Sand War 4 countries Soviet-Afghan War 4 countries Spanish-American War 4 countries Suez Crisis 4 countries War on Terrorism 4 countries War over Water 4 countries 1948 Palestine war 3 countries Bangladesh Liberation War 3 countries Chinese Civil War 3 countries Indonesian National Revolution 3 countries Malespín's War 3 countries Mozambican Civil War 3 countries Ogaden War 3 countries Russian invasion of Ukraine 3 countries Shaba II 3 countries Spanish American wars of independence 3 countries Transnistria War 3 countries Twelve-Day War 3 countries War of 1812 3 countries War of the Pacific 3 countries Winter War 3 countries full-scale Russo-Ukrainian war 3 countries 1982 Lebanon War 2 countries 2014 Russian invasion of Ukraine 2 countries 2026 Afghanistan–Pakistan War 2 countries Agacher Strip War 2 countries Algerian War 2 countries American Indian Wars 2 countries Anglo-Iraqi War 2 countries Battles of Sadarak 2 countries Cambodian–Vietnamese War 2 countries Cenepa War 2 countries Chaco War 2 countries Chadian–Libyan War 2 countries Djiboutian–Eritrean border conflict 2 countries Dutch–Hanseatic War 2 countries Eastern Front 2 countries Ecuadorian–Peruvian War 2 countries Eritrean War of Independence 2 countries Eritrean–Ethiopian War 2 countries Ethiopian-Somali border conflict 2 countries Falklands War 2 countries First Nagorno-Karabakh War 2 countries Franco-Prussian War 2 countries Guatemalan-Salvadoran war of 1906 2 countries Honduran-Salvadoran War of 1871 2 countries Hundred Hour War 2 countries Indo-Pakistani War of 1965 2 countries Indo-Pakistani War of 1971 2 countries Indonesia–Malaysia confrontation 2 countries Iran–Israel proxy conflict 2 countries Iran–Saudi Arabia proxy conflict 2 countries Iran–Turkey proxy conflict 2 countries Iraqi Civil War of 2014–2017 2 countries Kargil War 2 countries Kashmir conflict 2 countries Libyan–Egyptian War 2 countries Livonian Crusade 2 countries Mexican-American War 2 countries Peruvian Pacification War 2 countries Russo-Georgian War 2 countries Rwandan Civil War 2 countries Second Chechen War 2 countries Second Liberia War 2 countries Second Sudanese Civil War 2 countries Sino-Indian War 2 countries Sino-Vietnamese War 2 countries Sri Lankan Civil War 2 countries Svante Nilsson Sture's War against Denmark 2 countries Uganda–Tanzania War 2 countries Uruguayan War 2 countries War in Abkhazia 2 countries War of Dominican Independence 2 countries insurgency in Khyber Pakhtunkhwa 2 countries 1948 Arab–Israeli War 1 country 1994 Summer War 1 country 6000-Mark War 1 country Algerian Islamic Front War 1 country American Civil War 1 country Anglo-Afghan Wars 1 country Anglo-Egyptian War 1 country Arab–Israeli Wars 1 country Bafut Wars 1 country Barbary Wars 1 country Belgian–Dutch War 1 country Burmese–Siamese War of 1785–86 1 country Byzantine–Serbian Wars 1 country Casamance conflict 1 country Caste War of Yucatán 1 country Chilean War of Independence 1 country Comanche Wars 1 country Continuation War 1 country Crimean-Russian Wars 1 country Croatian War of Independence 1 country Croat–Bosniak War 1 country Dirty War 1 country Djiboutian Civil War 1 country Dniestrian Independence War 1 country Dominican Restoration War 1 country Ecuadorian–Colombian War 1 country Eelam War I 1 country Eelam War II 1 country Eelam War III 1 country Estonian War of Independence 1 country Ethiopian Civil War 1 country Fenian raids 1 country Finnish Civil War 1 country Finnish War 1 country First Barbary War 1 country First Burundi War 1 country First Chad (FROLINAT) Rebellion 1 country First Chechen War 1 country First Guatemala War 1 country First Rwanda War 1 country First Soviet-Finnish War 1 country First Uganda War 1 country Franco-Thai War 1 country French Revolutionary Wars 1 country Gaza War (2008–2009) 1 country Georgia War 1 country Germany Unification War 1 country Gran Colombia–Peru War 1 country Internal Bosniak conflict in Bosnian Krajina 1 country Ionian Revolt 1 country Japanese–Montenegro War 1 country Kachin conflict 1 country Laotian Civil War 1 country Lapland War 1 country Liberian–Grebo War 1 country Lithuanian Wars of Independence 1 country Lithuanian–Soviet War 1 country Löwendalsfejden 1 country Malayan Emergency 1 country Mexican drug war 1 country Nauruan Civil War 1 country Nigerian Civil War 1 country North Yemen civil war 1 country Old Zürich War 1 country Opium Wars 1 country Paquisha War 1 country Perak War 1 country Platine War 1 country Polish-Lithuanian-Teutonic War 1 country Polish–Lithuanian War 1 country Polish–Muscovite War 1 country Qatari–Abu Dhabi War 1 country Rhodesian Bush War 1 country Russian Civil War 1 country Russo-Swedish War of 1741-1743 1 country Russo-Swedish War of 1788–1790 1 country Salvadoran Campaign of 1832 1 country Saudi–Yemeni War 1 country Second Cambodia Civil 1 country Second Crusade 1 country Second Danish-Hanseatic War 1 country Second Guatemala War 1 country Second Hundred Years' War 1 country Second Northern War 1 country Second Rwanda War 1 country Second Schleswig War 1 country Shifta War 1 country Siamese–Vietnamese War of 1841–1845 1 country Sino-Soviet border conflict 1 country Sino–Mongolian War 1 country Somaliland War of Independence 1 country Song-Lý War 1 country South Lebanon conflict 1 country Soviet-Bulgarian War 1 country Soviet-Finnish wars 1 country Spanish–American War 1 country Spanish–Ottoman Wars 1 country Swedish-Norwegian War 1814 1 country Swedish–Novgorodian Wars 1 country Texas–Indian Wars 1 country Third Anglo-Afghan War 1 country Third Guatemala War 1 country Third Rwanda War 1 country Toyota War 1 country Victorio's War 1 country Vietnamese–Laotian War of 1467–1480 1 country War against Sigismund 1 country War in Darfur 1 country War in Somalia 1 country War of Dagestan 1 country War of the Confederation 1 country War of the Third Coalition 1 country Yaqui Wars 1 country list of wars involving Saudi Arabia 1 country