/ˈkeɪsəs ˈbɛlaɪ/ – Phrase
Definition: nguyên cớ gây chiến.
A more thorough explanation: Casus belli is a Latin term that translates to “an act or event that provokes or is used to justify war.” In legal terms, it refers to a justification or reason for a country to go to war against another country.
Example: The violation of the treaty was seen as a casus belli, justifying the declaration of war by the aggrieved nation.