Nevertheless , the al-Murabitoun did not lose its military capabilities , and during the June 1982 Israeli invasion of Lebanon , they helped the PLO in the defense of the southwestern outskirts of the Lebanese Capital from IDF attacks until the end of the siege in September of that year . The 1982 Israeli Judicial inquiry into events in Beirut estimated that the strength of the al-Murabitoun in West Beirut was 7,000 fighters
events in Beirut
Sabra and Shatila massacre
Al-Mourabitoun