 The PLO, on the other side, reportedly converted itself into a regular army by purchasing large weapon systems, including Soviet WWII-era T-34 tanks, which it deployed in the "Tyre Pocket" with an estimated 1,500 fighters.It kept shelling into Galilee until a cease-fire in July 1981.As discontent within the Shiite population about the suffering from the conflict between Israel and the Palestinian factions grew, tensions between the Amal Movement - the dominant Shia-party - and the Palestinian militants escalated into violent clashes in many villages of Southern Lebanon, including the Tyre area.