Peace enforcement is the use of various tactics, most notably military force to compel peace in a conflict, generally against the will of combatants.[1][2] Peace enforcement missions permit the use of non-defensive armed force, unlike peacekeeping operations. Only the United Nations, through its Security Council per Chapter VII of its charter, has the ability to authorize peace enforcement missions.[3][4]
Peace enforcement differs from peacekeeping in that peace enforcement activities are generally used to create a peace from a broken ceasefire, or to enforce a peace demanded by the United Nations.[1][3] Peace enforcement requires more military force than peacekeeping, and is consequently carried out by heavily armed forces.[1] However achieving lasting peace through peace enforcement is limited, as such missions do not address the underlying problems which caused conflict.[5] While peacekeeping missions utilize personnel from several countries, peace enforcement forces often originate from one state or a small coalition of states.[6]
Perhaps the two most prominent examples of peace enforcement are the Korean War and the Gulf War. In both cases, a country invaded another as part of an illegal war of aggression, only to be repulsed by a UN military coalition.[3]