The South Lebanon conflict (1985–2000) (known in Israel as the Security Zone in Lebanon Campaign) refers to 15 years of warfare between the Lebanese proxy militias SLA with military and logistic support of Israel Defense Forces against Lebanese Muslim guerrillas led by Hezbollah, within what was defined as the "Security Zone" in South Lebanon. It can also refer to the continuation of conflict in this region, beginning with the Palestine Liberation Organization (PLO) operations transfer to South Lebanon, following Black September in the Kingdom of Jordan. Historical tension between Palestinian refugees and Lebanese factions fomented the violent Lebanese internal political struggle between many different factions. In light of this, the South Lebanon conflict can be seen as a part of the Lebanese Civil War.