Look up casus belli in Wiktionary, the free dictionary.
Casus belli is a Latin expression meaning "An act or event that provokes or is used to justify war".
Casus Belli may also refer to:
- Casus Belli (Jericho episode), an episode of the American television series Jericho
- Casus Belli (magazine), a French roleplaying magazine
- Casus Belli (Homeland), an episode of the American television series Homeland