Casus belli
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{{For|the episode of the television series [[Jericho (TV_series)|Jericho]]|Casus Belli (Jericho episode)}}
'''''Casus belli''''' is a [[Latin|Latin language]] expression meaning the justification for acts of war. ''Casus'' means "incident", "rupture" or indeed "case", while ''belli'' means "of war". It is usually distinguished from ''[[casus foederis]]'', with ''casus belli'' being used to refer to offenses or threats directly against a nation, and ''casus foederis'' to refer to offenses or threats to another, allied, nation with which the justifying nation is engaged in a mutual defense treaty, such as [[NATO]].<ref name=Bynkershoek1>{{Cite book | title = A Treatise On The Law Of War | author = bynkershoek, Cornelius van | publisher = [[Lawbook Exchange]] | year = 2007 | isbn = 1584775661 }}</ref><ref name=Bynkershoek2>{{Cite book | title = On Questions of Public Law | author = bynkershoek, Cornelius van | publisher = [[William S. Hein & Company]] | year = 1995 | isbn = 1575882582 }} [http://www.constitution.org/bynk/bynk.htm Online copy].</ref>
It is often misspelled and mispronounced as "ca'''u'''sus belli" since this resembles the English "[[cause]]" (and a different Latin word, ''causa'' {cause}). "Casus belli" is also pronounced this way because the term is used with the meaning of "cause for war", instead of "case of war" (notice that "case" comes from Latin "casus").
The term came into wide usage in the seventeenth and eighteenth centuries with the writings of [[Hugo Grotius]] (1625), [[Cornelius van Bynkershoek]] (1737), and [[Jean-Jacques Burlamaqui]] (1748), among others, and the rise of the political [[doctrine]] of ''[[jus ad bellum]]'' or "[[just war]] theory".<ref name=Russell>{{Cite book | title = The Just War in the Middle Ages | author = Russell, Frederick H. | publisher = [[Cambridge University Press]] | year = 1997 | isbn = 052129276x }}</ref><ref name=Childress>{{Cite journal | author = [[James Childress|Childress, James F.]] | title = Just-War Theories: The Bases, Interrelations, Priorities, and Functions of Their Criteria | journal = Theological Studies | volume = 39 | year = 1978 | pages = 427–45 }}</ref> Informal usage varies beyond its technical definition to refer to any "just cause" a nation may claim for entering into a conflict. As such, it has been used both retroactively to describe situations in history before the term came into wide usage and in the present day when describing situations when war has not been formally declared.
Formally, a government would lay out its reasons for going to war, as well as its intentions in prosecuting it and the steps that might be taken to avert it. In so doing, the government would attempt to demonstrate that it was going to war only as a last resort ([[ultima Ratio]]) and that it in fact possessed "just cause" for doing so. Effectively [[international law]] today only allows three situations as legal cause to go to war: out of self-defense, defense of an ally under a mutual defense pact, or sanctioned by the UN. Any war for another cause is considered [[illegal war|illegal]] and those who engage in it subject to prosecution for a [[war crime]].
'''Proschema''' (plural ''proschemata'') is the Greek equivalent term. These stated reasons may or may not be the actual reason for waging the war ([[prophases]]). The term was first popularized by [[Thucydides]] in his ''History of the Peloponnesian War'', who identified fear, honor, and interest as the three primary ''real'' reasons that wars are waged, while ''proschemata'' commonly play up nationalism or fearmongering (as opposed to rational or reasonable fears).
== Reasons for use ==
Countries generally need a justification of some sort for attacking another country. The justification may be needed principally to galvanize support for the war internally (since citizens may not be happy about being expected to fight and die in a dubious cause), or else to galvanize the support of potential allies and reduce or avoid international sanctions or possible intervention. This has been the case for much of world history and is still the case today.
In the post World War Two era, the [[UN Charter]] has made it illegal for signatory countries to engage in war except as a means of defending themselves against aggression, or unless the UN as a body has given prior approval to the operation. The UN also reserves the right to intervene against non-signatory countries which embark on [[war of aggression|wars of aggression]]. In effect, this means that countries in the modern era must have a plausible casus belli for initiating military action, or risk possible UN sanctions or intervention.
== Historical examples==
=== Spanish-American War ===
The US navy ship [[USS Maine (ACR-1)|USS ''Maine'']] sank in the Havana Harbor from an explosion whose cause remains controversial. Critics such as [[Gore Vidal]] have claimed that the explosion was a purposeful act to create a phony casus belli for the US to attack the Spanish. This gave the United States the political cover to have an excuse to attack Spain triggering the [[Spanish-American War]] because the US government accused the Spaniards of being responsible for the explosion{{Fact|date=February 2007}}.
=== World War I ===
A political assassination provided the trigger that led to the outbreak of [[World War I]]. [[Assassination in Sarajevo|The assassination]] in June 1914 of [[Archduke Franz Ferdinand of Austria]] at [[Sarajevo]] in [[Austria-Hungary]] by [[Gavrilo Princip]], a [[Yugoslavs|Yugoslav]] nationalist from Bosnia, Austrian subject and member of [[Young Bosnia]], was used by [[Austria-Hungary]] as a casus belli for declaring war on [[Serbia]].
The [[Russian Empire]] started to mobilise its troops in defence of its ally Serbia, which resulted in the [[German Empire]] declaring war on Russia in support of its ally Austria-Hungary. Very quickly, after the involvement of [[France]], the [[Ottoman Empire]] and the [[British Empire]], five of the six great European powers became involved in the first European general war since the [[Napoleonic Wars]]. (see [[Causes of World War I]])
=== World War II===
In his autobiography ''[[Mein Kampf]]'', [[Adolf Hitler]] had advocated in the 1920s a policy of ''[[lebensraum]]'' ("living space") for the [[Germans|German people]], which in practical terms meant German territorial expansion into Eastern Europe.
In August 1939, in order to implement the first phase of this policy, [[Germany]]'s [[Nazi]] government under Hitler's leadership staged the [[Gleiwitz incident]], which was used as a casus belli for the [[invasion of Poland]] the following September. Since [[Poland]]'s allies [[United Kingdom|Britain]] and [[France]] honoured their alliance and subsequently declared war on Germany, the invasion of Poland marks the start of [[World War II]].
In 1941, acting once again in accordance with the policy of lebensraum, [[Nazi Germany]] [[Operation Barbarossa|invaded the Soviet Union]], using the casus belli of [[pre-emptive war]] to justify the act of aggression.
The [[Soviet Union]] also employed a manufactured casus belli during World War II. In November 1939, shortly after the outbreak of hostilities between Germany, Britain and France, the Soviet Union [[Shelling of Mainila|staged the shelling]] of the Russian village of Mainila, which it blamed on the Finns. This manufactured incident was then used as a casus belli for the [[Winter War|invasion of Finland]]. In 1998, Russian President [[Boris Yeltsin]] admitted that the invasion had in fact constituted a Soviet [[war of aggression]].
Additionally, [[Pearl Harbor advance-knowledge debate|some sources theorize]] that the US government had prior warning of the impending Japanese [[attack on Pearl Harbor]], but chose to ignore it in order to shock the country out of its prevailing mood of [[isolationism]]. By allowing the Japanese "stab in the back" to take place, this theory effectively contends, the US administration would be handed the strongest possible casus belli which would ensure the full and undivided support of the American populace for the coming war effort.
=== Six-Day War ===
A casus belli played a prominent role during the [[Six-Day War]] of 1967. The Israeli government had a short list of casus belli, acts that it would consider provocations justifying armed retaliation. The most important was a blockade of the [[Straits of Tiran]] leading into [[Eilat]], Israel's only port to the [[Red Sea]], through which Israel received much of its oil. After several border incidents between Israel and [[Egypt]]'s allies [[Syria]] and [[Jordan]], Egypt expelled [[United Nations Emergency Force|UNEF]] peacekeepers from the [[Sinai Peninsula]], established a military presence at [[Sharm el-Sheikh]], and announced a blockade of the straits, prompting Israel to cite its casus belli in opening hostilities against Egypt.
=== Vietnam War ===
Some historians have suggested that the [[Gulf of Tonkin Incident]] was a manufactured pretext for the [[Vietnam War]]. North Vietnamese Naval officials have publicly stated that the [[USS Maddox (DD-731)|USS ''Maddox'']] was never fired on by North Vietnamese naval forces<ref>"[http://vi.uh.edu/pages/buzzmat/world198_4.html McNamara asks Giap: What happened in Tonkin Gulf?]". (November 9, 1995). ''[[Associated Press]]''</ref><ref>[http://www.cnn.com/SPECIALS/cold.war/episodes/11/interviews/mcnamara/ CNN Cold War - Interviews: Robert McNamara], retrieved [[January 23]], [[2007]]</ref>.
===1982 Israeli Invasion of Lebanon===
The casus belli cited by Israel for its June 1982 [[1982 Lebanon war|invasion of Lebanon]] was the attempted assassination of the Israeli Ambassador in London, which the Israeli government blamed on the [[PLO]] (although the attempt had actually been made by the [[Abu Nidal#The_ANO|PNLM]], a Palestinian splinter group implacably ''opposed'' to the PLO).<ref>Sachar, Howard M.: ''A History of Israel from the Rise of Zionism to Our Time'', Alfred A. Knopf 1996, ISBN 0-679-76563-8, page 904.</ref> In reality however, the invasion had long been planned by the Israelis,<ref>''"As early as January 1982, therefore, with [[Menachem Begin|Begin]]'s approval, [[Ariel Sharon|Sharon]] paid a secret visit to Beirut...By the following month...operational plans for the offensive were well advanced. Israeli liaison officers repeatedly visited Beirut to coordinate strategy with the [[Phalange]]. In the end, the Lebanon expedition would be the most thoroughly prepared campaign in Israel's history."'' - Sachar, ''A History of Israel'', p. 903</ref> who were concerned about the growing power of the PLO in Lebanon.
=== Turkey and Greece ===
In 1995, [[Grand National Assembly of Turkey|The Turkish Parliament]] issued a casus belli against [[Greece]] in reaction to an enacted extension of Greek [[territorial waters]] from {{convert|6|nmi|km|0}} to {{convert|12|nmi|km|0}} from the coast (See [[Aegean dispute]]).<ref>[http://www.europa-digital.de/aktuell/dossier/tuerkei/aegaeis.shtml europa-digital.de/aktuell/dossier/tuerkei/aegaeis.shtml<!-- Bot generated title -->]</ref> [[Turkey]] has not removed this casus belli despite initiation of preliminary negotiations in order for it to join the [[European Union]].{{Fact|date=June 2007}}
===War on Terror===
The casus belli for the [[George W. Bush administration|Bush administration]]'s conceptual [[War on Terror]], which resulted in the 2001 [[War in Afghanistan (2001–present)|Afghan war]] and the 2003 [[2003 Iraq war|Iraq war]], was the [[September 11, 2001 attacks]] on the [[World Trade Center]] in [[New York City]], [[The Pentagon]] in [[Arlington, Virginia]] and the apparently intended attack on the [[United States Capitol]] in [[Washington, D.C.]].
===2003 Invasion of Iraq===
The United States' stated casus belli for its 2003 invasion of Iraq was [[Saddam Hussein]]'s alleged non-compliance with the terms of cease fire for the 1990 - 1991 [[gulf war]].
Cited by the Bush Administration was [[Saddam Hussein]]'s [[weapons of mass destruction]] (WMD) program. The administration stated that Iraq had not conformed with its obligation to disarm under past UN Resolutions, and that Saddam Hussein was actively attempting to acquire a nuclear weapons capability as well as enhance an existing arsenal of chemical and biological weapons. Secretary of State [[Colin Powell]] addressed a plenary session of the [[United Nations Security Council]] on February 5, 2003 citing these reasons as justification for military action.[http://www.state.gov/secretary/former/powell/remarks/2003/17300.htm] Also, the Bush Administration alleged that Iraq attempted to acquire yellowcake uranium from Niger, but these allegations were found to be [[Niger_uranium_forgeries|dubious and partly based on forged documents]].
Subsequent to the invasion, a US government-sponsored report concluded that although Saddam Hussein had intended to resume [[weapons of mass destruction|WMD]] production once the [[gulf war]] sanctions were lifted, no significant [[weapons of mass destruction|WMD]] stockpiles existed at the time of the invasion. [http://www.cnn.com/2003/ALLPOLITICS/10/02/kay.report/]
== Casus Belli in popular culture ==
* ''[[Canadian Bacon]]'' was a satirical comedy directed by [[Michael Moore]] about a U.S. President who used the [[CIA]] to create a phony attack on the [[United States]] and blame it on Canada, intentionally creating conflict with [[Canada]].
* In the computer game ''[[Europa Universalis]]'' and its sequels, casus belli plays a significant role in war. If war is declared on another nation without a casus belli, the aggressor will suffer a stability penalty, causing a general unrest within the country.
* In the computer games ''[[Supreme Ruler 2010]]'' and ''[[Supreme Ruler 2020]]'', casus belli is affected by several factors during gameplay. The largest increase happens when an unjustified war is declared or triggered.
* In the board game ''[[Pax Britannica]]'' by [[Victory Games]], players are limited to declaring war if they have a casus belli against the defending nation.
== References ==
* Vidal, Gore. ''[[Imperial America: Reflections on the United States of Amnesia]]''. Hardcover ed. Avalon Group.
<div class="references-small"><references /></div>
== See also ==
* [[Command responsibility]]
* [[False flag]]
* [[Jus ad bellum]]
* [[Casus foederis]]
* [[List of Latin phrases]]
* [[UN Charter]]
* [[War of aggression]]
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