Following the Israeli occupation of Lebanon's southern half in 1982, the Druze militias that controlled the Chouf were defeated and the PSP lost the territory that it controlled to the Israeli invasion. On 24 August,
Bachir Gemayel, the leader of the
Kataeb Party and its military wing, the
Lebanese Forces, was elected
President of Lebanon by the
Lebanese Parliament, and despite his intentions to dissolve all the non-state militias and ensure the "liberation of Lebanon from all foreign armies" (including Israel) from Lebanon, PSP leader Walid Jumblatt viewed Gemayel's future presidency with suspicion describing the Lebanese internal structure as a "diktat" that was "destined to fall apart". When asked if he believed the civil war would restart, he said "there is a general "malaise" in West Beirut, we are afraid. So the prognosis is very poor. On the constitutional level he was elected legally, on the political level it is something else." Following Bachir's assassination in September 1982, his brother
Amine Gemayel took over the presidency and signed the
May 17 Agreement with Israel, which led to Walid viewing his regime with increasing hostility. Throughout the summer of 1983, an embattled Walid Jumblatt began reorganising and rearming with Palestinian and Syrian assistance the
People's Liberation Army (PLA), the armed wing of the PSP, as the prospect of war with the Lebanese government grew. In September 1983 the
Israeli Defense Forces withdrew from the Chouf and the Lebanese Army alongside the Lebanese Forces entered the region seeking to subdue the resurgent PSP/PLA, sparking the
Mountain War. ==The battle==