August 24, 1982
AdministrationRonald Reagan (First Term)
Was 4(a)(1) Triggered? (Hostilities/Imminent Hostilities)
No, as stated in report
Was 4(a)(2) Triggered? (Combat- Equipped Introduction)
Yes, stated or used terms in statute
Was 4(a)(3) Triggered? (Substantial Enlargement)
No, as described in/inferred from report
Details: "close coordination with the Lebanese Armed Forces" and French and Italian military personnel "in the multinational force"
Article 51 Report to UN
Not applicable because no self-defense claim
Details: Assist Lebanon as part of multinational force "in carrying out its responsibilities concerning the withdrawal of Palestinian [PLO] personnel"
Domestic Legal AuthorityConstitution (Art. II)
Details: "This deployment of the United States Armed Forces to Lebanon is being undertaken pursuant to the President's constitutional authority with respect to the conduct of foreign relations and as Commander-in-Chief of the United States Armed Forces."
Claimed International Legal BasisConsent of territorial state
Details: "In response to the formal request of the Government of Lebanon"
Details: "the United States military personnel will be withdrawn from Lebanon within thirty days"
Type of Enemy or MissionNon-state actor
Details: Palestine Liberation Organization leadership, offices, and combatants in Beirut
Military ActivityUse of ground forces
Details: Deployment of 800 Marines "equipped with weapons consistent with their non-combat mission, including usual infantry weapons" to assist the Government of Lebanon with "withdrawal of Palestinian personnel"
US Casualties Reported
Non-US Casualties Reported