The SLA had already lost a lot autonomy by 1984 (they started around 1975, and established the Free Lebanon State), I think Israel plan after the SLA Leader died of cancer in 1982 was to annex the entire region, but then Hezbollah and their allies (some conservative muslim militias, socialists and some other christians who didn't like Israel) started to push Israel back a lot, by 1998 Israel had started to withdraw and leaving their positions for the SLA soldiers who immediatly went AWOL. By 2000 the entire "goverment" had collapsed with the most of their leaders and soldiers establishing a "goverment-in-exile" in Tel Aviv which is more or less just a weird LARPing group where they cry about Hezbollah, Saddam Hussein, Syria and Palestine.