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From our dictionary:
ca•sus bel•li
(kA'sus bel'I, bel'E; Lat. kä'sOOs bel'lE),
—n.
1. an event or political occurrence that brings about a declaration of war.
(kA'sus bel'I, bel'E; Lat. kä'sOOs bel'lE),
—n.
1. an event or political occurrence that brings about a declaration of war.
