casus belli
Conflict's triggering event
Casus belli is Latin for an act or situation that justifies or provokes war.
In diplomatic and military contexts, it refers to the specific grievance or incident that triggers armed conflict: The assassination served as a casus belli for the invasion.
The term often carries skepticism—implying the stated cause may be a pretext rather than the true motivation.
Stated basis for action
- groundsBasis for justification
- pretextFabricated motive concealing truth
- excuseOffered reason for wrongdoing
- reasonBasis or justification
cause · basis · legitimization · warrant · defense · argument · vindication · motivation
Armed struggle between groups
- hostilitiesActive armed fighting
- invasionForcible entry into territory
- declaration of warFormal announcement of hostilities
- military actionArmed force by state
armed conflict · intervention · retaliation · escalation · mobilization · annexation · occupation · incursion
A distinct event
- triggerWhat initiates action
- sparkTiny fiery particle
- affrontDeliberate public insult
- insultOffensive remark or action
violation · infringement · attack · assassination · ultimatum · offense · outrage · aggression
Deceptive outward show
- guiseExternal manner shown
- fabricationDeliberately untrue statement
- smokescreenConcealment through misdirection
- facadeDeceptive outward appearance
subterfuge · cover · ruse · ploy · sham · charade · feint · false flag
rationale
Stated basis for action
- groundsBasis for justification
- pretextFabricated motive concealing truth
- excuseOffered reason for wrongdoing
reason · cause · basis · legitimization · warrant · defense · argument · vindication · motivation · necessity
war
Armed struggle between groups
- hostilitiesActive armed fighting
- invasionForcible entry into territory
- declaration of warFormal announcement of hostilities
military action · armed conflict · intervention · retaliation · escalation · mobilization · annexation · occupation · incursion · siege
incident
A distinct event
insult · violation · infringement · attack · assassination · ultimatum · offense · outrage · aggression · hostility
pretense
Deceptive outward show
- guiseExternal manner shown
- fabricationDeliberately untrue statement
- smokescreenConcealment through misdirection
facade · subterfuge · cover · ruse · ploy · sham · charade · feint · false flag · propaganda
casus bellipeace treaty
Formal end to hostilities
armistice · peace accord · ceasefire agreement · détente · rapprochement
casus bellireconciliation
Restoration of friendly relations
conciliation · peace offering · goodwill gesture · amends · reparations
case, casual, occasion, rebel, antebellum, casualty, belligerent, bellicose, belligerence