List of wars between democracies
This is an incomplete list of wars between entities that have a constitutionally democratic form of government. Two points are required: that there has been a war, that there are democracies on at least two opposing sides. For many of these entries, whether there has been a war, or a democracy, is a debatable question; all significant views should be given. See also List of types of democracy.
Almost all of these depend on the definition of "democracy" (and of "war") employed. As James Lee Ray points out, with a sufficiently restrictive definition of democracy, there will be no wars between democracies: define democracy as true universal suffrage, the right of all – including children – to vote, and there have been no democracies, and so no wars between them.
On the other hand, Ray lists the following as having been called wars between democracies, with broader definitions of democracy: The American Revolution including the Fourth Anglo-Dutch War, the French Revolutionary Wars, the War of 1812, the Belgian Revolution, the Sonderbund War, the war of 1849 between the Roman Republic and the Second French Republic, the American Civil War, the Spanish–American War, the Second Philippine War, the Second Boer War, World War I, World War II (as a whole, and also the Continuation War by itself), the Israeli War of Independence, the Indo-Pakistani War of 1947–1948, the Six-Day War, the Yugoslav Wars, and the Armenia-Azerbaijan War. Most Native American tribes also had democratic forms of government, and they often fought each other up until the late 19th century, as did most tribes of Norsemen during the Middle Ages.
Similarly, the school of Ted Robert Gurr, founder of the Polity IV dataset, divides regimes into three classes: democracies, autocracies, and "anocracies"; the last being the sort of weak or new states which are marginal democracies or marginal autocracies; many of the wars below involve weak or marginal democracies.
The Peloponnesian war included a great many conflicts among Greek city-states. The principal war was between Athens and her allies (most of them democracies) on one side, and Sparta and her allies (most of them oligarchies—although most of them held elections among a citizen body) on the other. But the war lasted for twenty-seven years, with a brief armistice, and a great many side-conflicts occurred; and states changed from democracy to oligarchy and back again. Most notable of the wars between democracies was the Sicilian Expedition, 415–413 BC, in which Athens went to war with Syracuse. Bruce Russett finds 13 conflicts between "clear" democratic pairs (most of these being Athens and allies in the Sicilian Expedition) and 25 involving "other" democratic pairs. Classicist Mogens Herman Hansen thinks one of Russett's examples unlikely, but adds several instances of wars between democracies before and after the Peloponnesian War.
The constitution of the Roman Republic, before its collapse in the late 1st century BC, is amply documented; its magistrates (including the Roman Senate, which was composed of current and former magistrates) were elected by universal suffrage by adult (male) citizens; all male citizens were eligible. There was a political class of wealthy men; most successful candidates belonged to this class, and all of them were supported by a party drawn from it, but this does not distinguish Rome from other democracies—nor, indeed, from non-democratic states; freedom of speech was, however, a characteristic difference between the Republic and the later Roman Empire.
- The Punic Wars. The old constitution of Carthage, before the First Punic War, was described by Aristotle as a mixture of democracy and oligarchy; after the disastrous end of that war, about 240 BC, there was a democratic change, the direct election of a pair of executives, and the Second Punic War was fought under that constitution; there continued to be an oligarchic party. There were several further changes of party, and democratic reforms; the election of the democratic party, which favored a less passive foreign policy, in 151 BC provoked Rome to begin the Third Punic War two years later.
- The Quasi War from 1798 to 1800 between the United States and the French Republic.
- War of 1812
- Mexican–American War 
- Sonderbund War
- War of 1849 between the Roman Republic and the Second French Republic
- American Civil War
- War of 1859 between Peru and Ecuador.
- Spanish–American War
- First and Second Boer Wars.
- Second Philippine War.
- First Balkan War (1912–13). The Young Turks had re-established constitutional government in Ottoman Turkey in 1908, and continued to struggle for greater liberalization; the "relatively democratic" Constitution of Serbia had been restored in 1903, and attained complete openness of executive recruitment. Serbia and its allies, the constitutional monarchies of Greece and Bulgaria, won the war; Turkey suffered a military coup as a result of defeat.
- First World War. The Polity IV dataset does not rank any of the Central Powers as democracies, although the component of democracy for Germany had been higher than that of autocracy since the 1890s, when Bismarck was replaced by Leo von Caprivi; neither does the somewhat controversial ranking of Tatu Vanhanen; on the other hand, all of the Central Powers had elected parliaments; the Reichstag had been elected by universal suffrage, and voted on whether a credit essential to the German conduct of the war should be granted. Whether this is democratic control over the foreign policy of the Kaiser is "a difficult case"; Michael W. Doyle concludes, however, that the government was not absolutely dependent on the Reichstag - and that Germany was a dyarchy, effectively a mixture of two different constitutions, and democratic on internal affairs.
- Polish–Lithuanian War: Fought in 1920, with about 1000 estimated battle deaths. In both states, elections had been held with universal suffrage. In the polity scale, Poland received a +8 rating in combined democracy/autocracy in 1920, while Lithuania received a +7 in democracy and a +4 in combined democracy/autocracy. The conflict is seen by both Polish and Lithuanian historians as a part of the wars of independence from the Soviet Union.
- Continuation War: A formal state of war between the United Kingdom, Australia and Canada, on one side, and Finland on the other, resulting from the Finnish invasion of the Soviet Union in 1941; there was actual conflict between the United Kingdom and Finland, including an air raid against Finnish territory, with associated attacks on Finnish shipping, although that took place some months before the declaration of war.
- Israeli War of Independence: as against Lebanon; Israel had not yet held elections.
- First Kashmir War Ranked as a full-scale war between democracies in the International Crisis Behavior dataset; they present a table of crises ranking it as a full-scale war, cite it as an example of a crisis where both regimes were of the same type, and discuss the influence of India's democracy on the crisis and the related crises over other princely states. There were fewer than a thousand battlefield casualties in this war. Both countries, then Dominions, then had governments based on the Government of India Act 1935, implemented 1937, which set up Westminster democracy for all of British India; in Pakistan, the politicians, at odds with the civilian bureaucracy, failed to maintain civilian control over the military, and converted the Governor-Generalship into a political office; there was a military coup ten years after the war; the Polity IV dataset counts it as anocratic until 1957-8 (see above), the years before the coup; the same dataset shows India as having been a stable democracy throughout the period.
- Six-Day War: The Lebanese air force intervened against Israel, both then being democratic states; the same policy set classifies Lebanon as an anocracy, its neologism for imperfect or disputable democracies. although it was called at the time "the only Arab democracy."
- Football War
- Turkish invasion of Cyprus. An attack by Turkey, which had a new democratic government since 1973; Cyprus had been a constitutional democracy, although one with severe intercommunal problems, since independence in 1958; the Turkish invasion was a response to a coup. The democratic order of the Republic of Cyprus was restored three days after the invasion, and the war continued for another month. Page Fortna regards this as a debatable case of dual democracy.
- Paquisha War: War fought in 1981 between Ecuador and Peru. The leaders of both countries had been democratically elected. Ecuador receives a rating of +9 in the polity scale of combined democracy/autocracy, while Peru receives a +7, meaning that both countries are classified as democratic, and Ecuador even as "very democratic". However, the war involved only as high as two hundred deaths in battle. Furthermore, the Peruvian democracy was less than one year old and the Ecuadorian less than 3 years. In addition, both nations lacked democratic control over their militaries.
- Yugoslav Wars: Bosnia, Croatia and Serbia were all multiparty democracies.
- Cenepa War: A brief 1995 sequel of the Paquisha War between Ecuador and Peru.
- James Lee Ray: "Wars between democracies: Rare, or nonexistent?", International Interactions Volume 18, Issue 3 February 1993 , pages 251–276; child suffrage and from Ray, Democracy and International Conflict p.88. Restricted definitions of democracy can also be constructed which define away all wars between democracies, and yet include many regimes often held to be democratic; Ray finds this more rhetorically effective than saying that full-scale international war between established democracies with wide suffrage is less likely than between other pairs of states.
- Ze'ev Maoz, Nasrin Abdolali, "Regime Types and International Conflict, 1816–1976", Journal of Conflict Resolution vol. 33, no. 1 (March 1986) pp. 3–35.
- Bruce M. Russett, Grasping the Democratic Peace, p. 47–71; Russett, one of the few to consider the democratic peace before 1750, thinks it likely that the norm of interdemocratic peace developed gradually through the centuries.
- Hansen et al.: An inventory of archaic and classical poleis (2005), p. 85 et seq.
- Ronald Syme, The Roman Revolution (1939, repr. and revised 1962, including the view on the oligarchy behind all constitutions.
- David Churchman, Why We Fight: Theories of Aggression and Human Conflict, University Press of America (2005), p.143, who discusses Rome and Carthage.
- Serge Lancel: History of Carthage (1993, Eng. tr. 1995) pp. 116–120, 411; Richard Miles "Carthage must be destroyed" (2010): 214, 318, 337
- Bruce Russett, Controlling the Sword: the Democratic Governance of National Security (1990), p.123; George Modelski, "Is America's Decline Inevitable?" The Bridge 19:2, pp. 11–18, (1988)
- Reiter, D. and Stam, A.C., Democracies at War
- John Mueller, "Is War Still Becoming Obsolete?" paper presented at the annual meeting of the American Political Science Association, Washington, DC, August–September 1991, p51
- Small, Melvin; Singer, David J. (1976). "The War Proneness of Democratic Regimes, 1816–1965". Jerusalem Journal of International Relations 1: 50–69; Bruce Russett, Controlling the Sword: the Democratic Governance of National Security (1990), p.123
- Spiro, David E. (1994). "Give Democratic Peace a Chance? The Insignificance of the Liberal Peace". International Security, Vol. 19, No. 2. (Autumn, 1994): 50–86.
- Jeanne Gowa, Ballots and Bullets: the Elusive Democratic Peace, p.50
- Bruce Russett, Controlling the Sword: the Democratic Governance of National Security (1990), p.123; on the Orange Free State as direct democracy, see also The Encyclopedia of Religion in American Politics 2:74; in general, see Dean V. Babst. "Elective Governments — A Force For Peace." The Wisconsin Sociologist 3 (1, 1964): 9–14 (he writes of, and defines, freely elective governments, but his papers have been taken as the founding of democratic peace theory, and cited as being about democracies); Raymond Cohen, "Pacific unions: a reappraisal of the theory that 'democracies do not go to war with each other'", Review of International Studies 20 (3, 1994) 207–223.
- Spiro, David E. (1994). "Give Democratic Peace a Chance? The Insignificance of the Liberal Peace". International Security, Vol. 19, No. 2. (Autumn, 1994): 50–86; Walden Bello, Visions of a Warless World, p.46, expressly objecting to Rummel's definition of non-democracy as "very loose". Bello gives this as one example; he does not claim to be complete.
- Ayhat Kansu, Politics in post-revolutionary Turkey, 1908-1913, passim
- Mansfield and Snyder, Electing to Fight, MIT Press, 2007; pp. 210-11, 221.
- Mansfield and Snyder, Electing to Fight, MIT Press, 2007; p. 200
- Vanhanen calls his own methodology of ranking democracies approximate, and subject to short-term variation; others call it "unacceptable", and using "invalid" or "controversial" indicators; see Tatu Vanhanen, Democratization: a comparative analysis of 170 countries, Routledge, 2003, p. 36,61. He primarily uses it to measure and compare long-term trends in the democracy of single countries, in which such fluctuations will cancel out.
- Tatu Vanhanen, Democratization: a comparative analysis of 170 countries, Routledge, 2003, p72
- Doyle, Michael W. (1983a). "Kant, Liberal Legacies, and Foreign Affairs". Philosophy and Public Affairs 12 (Vol. 12, No. 3. (Summer, 1983)): p216
- "Polity IV Project". Retrieved March 4, 2006.
- Small, Melvin; Singer, David J. (1976). "The War Proneness of Democratic Regimes, 1816-1965". Jerusalem Journal of International Relations. 1: 50–69.
- Gleditsch, Nils P. (1992). "Democracy and Peace". Journal of Peace Research. 29 (4): 369–376. doi:10.1177/0022343392029004001. JSTOR 425538.; Wayman, Frank (2002). "Incidence of Militarized Disputes Between Liberal States, 1816-1992". Paper presented at the annual meeting of the International Studies Association, New Orleans, La., March 23–27, 2002
- Bruce Russett, Controlling the Sword: the Democratic Governance of National Security (1990), p.123: "the nearest exception"; Russett notes that Singer and Small (see note on the Continuation war) do not count Israel as yet being a democracy.
- Ray, Democracy and International Conflict p.120
- Brecher, Wilkenfeld, and Moser, Crises in the Twentieth Century, I, 129, 122, 209-10; they do not generally disaggregate the differences in regime type (democracy, civil authoritarianism, or military government) in each pair of states from other differences between states, and differences between other states in the same crisis. For a briefer discussion of the emerging democracy of India and the ultimately unsuccessful democracy of the Dominion of Pakistan, see Mansfield and Snyder, Electing to Fight, MIT Press, 2007; pp. 241-2.
- Imtiaz Omar: Emergency powers and the courts in India and Pakistan, 2002, p.2
- Cambridge History of India, Volume IV, part 1, Politics of India since independence, p. 61; for more discussion of the destruction of Pakistan's first democracy, see Ian Talbot: A short history of Pakistan, chapter 5, which cites the detailed history of the period, Allan McGrath, The Destruction of Pakistan's Democracy (1998). For Polity IV, see Diehl, Goertz and Saeedi, "Theoretical specifications of enduring rivalries" pp. 27-54 in T. V. Paul: The India-Pakistan Conflict; An Enduring Rivalry (2005), p. 47-8, which considers a difference of +7 the line marking full democracy.
- Doyle, Michael W. (1983a). "Kant, Liberal Legacies, and Foreign Affairs". Philosophy and Public Affairs 12 (Vol. 12, No. 3. (Summer, 1983)): 205–235
- Parker T. Hart: "A New American Policy towards the Middle East" Annals of the American Academy of Political and Social Science, Vol. 390, A New American Posture toward Asia (Jul., 1970), pp. 98-113
- David Churchman, Why We Fight: Theories of Aggression and Human Conflict", University Press of America (2005), p.143
- Mansfield and Snyder, Electing to Fight (2007), pp. 223-225; they also apply their theory that a democratizing regime tends to be belligerent to hold itself together to the military government in Greece, which was not directly involved in the war.
- Library of Congress Country Study: Cyprus, Chapter I
- Brecher, Wilkenfeld, and Moser, Crises in the Twentieth Century, I, 305-6; p. 128 ranks it as a full scale war.
- Virginia Page Fortna: Peace time: cease-fire agreements and the durability of peace. Princeton, NJ: Princeton University Press 2004; pp. 110-111.
- Weart, Spencer R. (1998). Never at War. Yale University Press. ISBN 978-0-300-07017-0. p. 70, 316.
- Solingen, Etel (1998). Regional Orders at Century's Dawn: Global and Domestic Influences on Grand Strategy. Princeton University Press. p. 96. ISBN 0691058806.