In August 1982, the PLO withdrew its forces from Lebanon (moving to Tunisia). Bashir Gemayel was elected President of Lebanon, and reportedly agreed to recognize Israel and sign a peace treaty. However, Gemayal was assassinated before an agreement could be signed, and one day later Phalangist Christian forces led by Elie Hobeika entered two Palestinian refugee camps and massacred the occupants. The massacres led to the biggest demonstration ever in Israel against the war, with as many as 400,000 people (almost 10% of the population) gathering in Tel Aviv. In 1983, an Israeli public inquiry found that Israel's defence minister, Sharon, was indirectly but personally responsible for the massacres. It also recommended that he never again be allowed to hold the post (it did not forbid him from being Prime Minister). In 1983, the May 17 Agreement was signed between Israel and Lebanon, paving the way for an Israeli withdrawal from Lebanese territory through a few stages. Israel continued to operate against the PLO until its eventual departure in 1985, and kept a small force stationed in Southern Lebanon in support of the South Lebanon Army until May 2000.