anxiety grew, as he didn't want to give Israel a pretext for another invasion. This time, Assad recruited the more powerful Shia Amal Movement militia headed by Nabih Berri to dislodge Arafat's loyalists. Assad benefited from this alliance, which enabled him to exert a greater degree of control over Lebanese affairs through his local Lebanese allies. The benefit for Amal was revenge for decades of Palestinian arrogance and the opportunity of gaining further control over Shia-populated areas of Lebanon. By mid-1985 Amal was also in conflict with the Druze Progressive Socialist Party (PSP) and its militia, the People's Liberation Army (PLA), led by Walid Jumblatt in the mountainous Chouf region. As Amal-PSP relations severely deteriorated, the Palestinian alliance with the Druze PSP was re-established. Unlike the majority of other Lebanese leftist militias, the Communist Action Organization in Lebanon (OCAL), led by Muhsin Ibrahim, refused to cooperate with Syria in its attempts to vanquish Arafat. This refusal brought the wrath of the Syrians on the OCAL, forcing them to operate underground from 1987 onwards. The war of the camps Opposing forces Allied with the pro-Arafat Palestinian refugee camp militias were the Lebanese Al-Mourabitoun, Sixth of February Movement, Communist Action Organization in Lebanon (OCAL), Druze Progressive Socialist Party (PSP) and Kurdish Democratic Party – Lebanon (KDP-L), who faced a powerful coalition of Lebanese Communist Party (LCP), and Shia Muslim Amal movement militia forces backed by Syria, the Lebanese Army, and the anti-Arafat Fatah al-Intifada, As-Sa'iqa, Palestine Liberation Army, and Popular Front for the Liberation of Palestine – General Command (PFLP–GC) dissident Palestinian guerrilla factions. Some Palestinian fighters were able to return to the camps via Cyprus. The journey involved paying substantial sums of money to the Lebanese Forces militia who controlled the port at Jounieh. On 2 January 1987 the ferry from Larnica with 164 passengers was turned back by the Israeli Navy. The fighters were not arriving in large numbers; one estimate suggests 3-4,000 arrived in 1985. April 1985 The February 6 Intifada forced the Multinational Force (MNF) to withdraw from Beirut in February–March 1984. Amal took control of West Beirut, establishing a number of outposts and checkpoints around the camps (mostly in Beirut, but also to the south). On 15 April 1985, an alliance of Amal, the PSP, and the Lebanese Communist Party (LCP) militia, the Popular Guard, attacked the Al-Mourabitoun, the main Sunni Nasserite militia and the closest ally