A French UNIFIL (United Nations Interim Force in Lebanon) soldier was killed in an ambush on Friday; three others were wounded, two seriously. UNIFIL and French officials called it a “deliberate attack.” French President Emmanuel Macron wrote that “everything suggests that responsibility for this attack lies with Hezbollah,” urging Lebanese authorities to bring those responsible to justice. Hezbollah denied responsibility. The group is designated a terrorist organization by several countries, including the United States and Germany; the EU designates only its armed wing as a terrorist entity.
UNIFIL has been caught up in fighting between Israel and Hezbollah. The most recent escalation began in March, when Hezbollah launched rockets into Israel days after Israel and the US had begun a joint attack on Iran. Since then, Israel has carried out incursions into parts of southern Lebanon. Nearly 2,300 people have been killed in Lebanon and more than 1 million displaced.
UNIFIL’s mission in southern Lebanon is seen as very dangerous. According to the UN, 343 peacekeepers have died there since 1978. In recent weeks three Indonesian UNIFIL troops were killed within 24 hours, and days later three others were wounded in an explosion.
What is UNIFIL?
The United Nations Interim Force in Lebanon began its mission in March 1978 after Israel’s invasion earlier that month. At the end of March 2026 it comprised about 7,500 peacekeepers from 47 countries. The largest troop contributors were Indonesia (755), Italy (754), Spain (658) and India (642).
UNIFIL forces are deployed across dozens of bases within roughly 1,060 square kilometers (about 410 square miles) between the internationally recognized Israeli-Lebanese border and Lebanon’s Litani River, about 30 kilometers north of the border. UNIFIL’s headquarters is in Naqoura.
Why is UNIFIL in Lebanon?
The UN Security Council established UNIFIL in 1978 to oversee the withdrawal of Israeli troops from southern Lebanon, restore peace and security, and assist the Lebanese government in regaining authority in the area. The mandate has been renewed annually by the Security Council.
In June 2000 the mandate was expanded when the UN established the Blue Line, a buffer zone between Lebanon and Israel, placed under UNIFIL control. The Blue Line is not a formal border but unauthorized crossings are not permitted.
UNIFIL’s mandate was further extended in 2006 through Security Council Resolution 1701, aimed at ending the war between Israel and Hezbollah. Resolution 1701 called for disarming armed groups near the border, including Hezbollah, and for deploying the Lebanese army in southern Lebanon; it specified that only the Lebanese military—not the Iran-backed Hezbollah militia—should possess arms in that area.
Most recently, the Security Council extended UNIFIL’s mandate with Resolution 2790 in August 2025 through the end of 2026, after which the mission is scheduled to end. Since late 2025 the troop contingent has been reduced by about 25%. A gradual withdrawal of peacekeepers is scheduled to be completed by the end of 2027, ending nearly five decades of UN presence in southern Lebanon.
What does UNIFIL actually do?
UNIFIL mainly serves as an observer force. Its tasks include foot and vehicle patrols between the Blue Line and the Litani River and maritime patrols with its UNIFIL Maritime Task Force. UNIFIL reports violations of Resolution 1701 to the UN Security Council.
When incidents occur across the Blue Line, UNIFIL says it deploys additional troops as needed to avoid direct conflict and to contain situations. The force liaises with the Lebanese army and the Israeli military as a non-partisan intermediary to try to prevent escalation.
Peacekeepers are allowed only a limited, gradual use of force for self-defense under specific circumstances and only to ensure the area of operations is not used for hostile activities.
Why is UNIFIL criticized?
Israel and the United States argue that the costly UNIFIL mission has not effectively prevented Hezbollah from operating and stockpiling weapons in southern Lebanon. In 2018 a Hezbollah tunnel was found running below the Blue Line into Israel. Lebanese governments have repeatedly said UNIFIL failed to stop Israeli violations of Lebanon’s airspace. Hezbollah leaders have accused UNIFIL of spying for Israel and said the UN force violates Lebanon’s sovereignty.
This article was originally published on October 11, 2024, and updated with recent figures on April 18 and April 19, 2026.
Edited by: Andreas Illmer