casus belli

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ca·sus bel·li

 (kā′səs bĕl′ī, kä′səs bĕl′ē)
n. pl. casus belli
An act or event that provokes or is used to justify war.

[New Latin cāsus bellī : Latin cāsus, occasion + Latin bellī, genitive of bellum, war.]

casus belli

(ˈkɑːsʊs ˈbɛliː)
n, pl casus belli (ˈkɑːsʊs ˈbɛliː)
1. (Military) an event or act used to justify a war
2. the immediate cause of a quarrel
[literally: occasion of war]

ca•sus bel•li

(ˈkeɪ səs ˈbɛl aɪ, ˈbɛl i; Lat. ˈkɑ sʊs ˈbɛl li)

n., pl. ca•sus bel•li (ˈkeɪ səs ˈbɛl aɪ, ˈbɛl i; Lat. ˈkɑ sus ˈbɛl li)
an event or political occurrence that brings about or is used to validate a declaration of war.
[1840–50; < New Latin: literally, occurrence of war]

casus belli

A Latin phrase meaning occasion of war, used to mean a reason or excuse for going to war or beginning a dispute.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.casus belli - an event used to justify starting a war
beginning - the event consisting of the start of something; "the beginning of the war"
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References in classic literature ?
I couldn't make a casus belli of it just then, because my Chief had taken all the troops to hammer a gang of slave kings up north.
Such might have been the end of it had the CASUS BELLI been other than it was; but Teeka was flattered at the attention that was being drawn to her and by the fact that these two young bulls were contemplating battle on her account.
It is fair to say that this casus belli has now largely escaped public discussion and is now mostly of interest only to historians.
Protection of Saudi Arabia and holy places by US troops during that war would provide the casus belli for Osama Bin Laden's jihad, the 9/11 attacks in the US, and the unleashing of political Islam as a revolutionary movement.
Le casus belli, provoque par l'attaque kurde contre les forces de securite turques dans la province de Hakari frontaliere avec l'Irak, a rallume le vieux conflit pourtant porteur d'espoir de paix bel et bien mort et enterre.
They've provided false-flag and other manufactured opportunities to declare violations as a casus belli to justify U.
The AKP has invented a casus belli against the pro-Kurdish Peoples' Democratic Party (HDP) out of nowhere, and is now fabricating reasons to demonize this party, which was only recently its good friend.
PASYDY has reservations about the issue, but its boss Glafcos Hadjipetrou, has said the matter "is not a casus belli," which meant he was at least willing to discuss it.
Another aspect of the same phenomenon relates to casus belli.
Any attempt to do so by the West will be seen as a casus belli.
5 MBD of Basra Light crude exports However, Iraqi Kurdistan is an invaluable strategic asset for the West, the reason its protection became a casus belli for President Obama while Syria's dead children were not.
Such captures are considered by Israel to be casus belli.