In 1978, in response to the Coastal Road massacre, Israel invaded Lebanon as part of Operation Litani, named after the Litani River, the south of which the Israelis would occupy. When the UN Security Council passed Resolution 425, which called for immediate Israeli withdrawal, Israel withdrew from South Lebanon, but backed a Christian-Shi'a militia called the South Lebanon Army in guarding a 19 kilometre security zone, along with a UN-backed peacekeeping force. The PLO, despite officially declaring a ceasefire, turned a blind eye as factions violated said ceasefire after fleeing north of the Litani River and the South Lebanon Army even shelled the UN peacekeeping force, killing eight UN peacekeepers, and later kidnapping three peacekeepers, killing two of them.
In 1982, after a PLO-aligned faction called the Abu Nidal Organization attempted to assassinate Israel's ambassador to the United Kingdom, Israel would again invade South Lebanon, creating a security zone in 1985 which would persist until 2000.
What if Israel ignored UN Resolution 425 and maintained a physical presence in Lebanon to deter the PLO, even expanding north of the Litani River if security needs necessitated such an action?
In 1982, after a PLO-aligned faction called the Abu Nidal Organization attempted to assassinate Israel's ambassador to the United Kingdom, Israel would again invade South Lebanon, creating a security zone in 1985 which would persist until 2000.
What if Israel ignored UN Resolution 425 and maintained a physical presence in Lebanon to deter the PLO, even expanding north of the Litani River if security needs necessitated such an action?