The "presence" mission assigned to the USMNF contemplated that the contending factions in Lebanon would perceive the USMNF as a neutral force, even handed in its dealings with the confessional groups that comprise Lebanese society. The mission statement tasked the USMNF to "establish an environment which will permit the Lebanese Armed Forces to carry out their responsibilities in the Beirut area." When hostilities erupted between the LAF and Shiite and Druze militias, USMNF efforts to support the LAF were perceived to be both pro-Phalangist and anti-Muslim.
USMNF support to the LAF increased substantially following their arrival in September 1982. The first direct military support to the LAF was in the form of training which the USMNF began to provide in November 1982.
In August and September 1983, the U.S. resupplied the LAF with ammunition. The LAF were engaged in intense fighting against the Druze and various Syrian surrogates. The ammunition came from MAU, CONUS and USCINCEUR stocks, and was delivered by Military Sealift Command, Mobile Logistic Support Force (CTF 63), and CTF 61 ships.
On 19 September 1983, naval gunfire was employed in direct support of the LAF at Suq-Al-Gharb.
Following the U.S. action in providing Naval gunfire support for the LAF at Suq-Al-Gharb, hostile acts against the USMNF increased and the Marines began taking significantly more casualties. A direct cause and effect linkage between Suq-Al-Gharb and the terrorist bombing on 23 October 1983, cannot be determined. The views of the senior civilian and military officials interviewed by the Commission varied widely on this issue. Some believe that it was not a consequence of our relationships with any faction; that regardless of its actions, the USMNF would still have been targeted by terrorists. Others believe that certain factions wanted to force the MNF out of Lebanon and that the bombing of the BLT Headquarters building was the tactic of choice to produce that end. The prevalent view within the USCINCEUR chain of command, however, is that there was some linkage between the two events. Whether or not there was a direct connection between Suq-Al-Gharb and the increase in terrorist attacks on the USMNF, the public statements of factional leaders confirmed that a portion the Lebanese populace no longer considered the USMNF neutral.