Intervention; interposition ; the act of a third person who interferes between two contending parties with a view to reconcile them or persuade them to adjust or settle their dispute. In international law and diplomacy, the word denotes the friendly interference of a state in the controversies of others, for the purpose, by its influence and by adjusting their difficulties, of keeping the peace in the family of nations.
See, e.g., What Is a Court Ordered Mediation?