UNIFIL Mandate Expires as New ‘Yellow Line’ Reshapes Southern Lebanon

French UNIFIL peacekeepers are now patrolling beyond the “yellow line,” a newly established restricted buffer zone in southern Lebanon that has fundamentally altered the region’s geography since a U.S.-brokered ceasefire took hold earlier this year. The mission of the United Nations Interim Force in Lebanon (UNIFIL), which has monitored the area since 1978, is set to expire on December 31 due to opposition from both the United States and Israel.

UNIFIL’s mandate has been expanded twice in its nearly five-decade history—first to verify Israel’s withdrawal from Lebanon and later in 1998 to monitor the ceasefire between Israel and Hezbollah. Despite the force’s long-standing role, its departure comes amid a fragile pause in a conflict that the Lebanese government reports has killed over 4,300 people and displaced more than 1.2 million since fighting resumed in March. Israel states that 39 of its military personnel and two civilians have been killed, along with seven UN peacekeepers.

The conflict has blurred the lines established by U.N. Security Council Resolution 1701 in 2006. While the historic “blue line” remains a reference point on maps, marked by blue barriers, the reality on the ground is now defined by Israel’s “yellow line.” This buffer zone, roughly five miles wide in some areas, covers approximately 6% of Lebanon’s territory. Israeli forces continue to occupy this strip to prevent rocket fire into northern Israel, having barred Lebanese civilians from accessing their land and demolishing numerous homes in border towns such as Houla, Kfar Kila, and Odaisseh.

Sgt. Audric, a French peacekeeper, noted that the force has recently regained freedom of movement in parts of the eastern sector that had been closed off by Israeli military presence. “Today, for the first time in several months, we are heading into the eastern sector. It is an opportunity for us,” he said. However, Lt. Col. Sebastián Dorado Santos, a Spanish public information officer, emphasized the operational difficulty posed by the new boundary: “The yellow line does not exist for us, but we have to mark it on the map so that we can visualize it.”

Dorado added that the restriction has severely disrupted daily life, preventing civilians from reaching their workplaces and, soon, their fields for the harvest season. Across the flattened towns, physical scars of the war are evident, with roads reduced to rough tracks and houses turned to rubble. Some areas still fly Israeli flags above the ruins.

While humanitarian convoys deliver essential supplies to isolated Christian villages like Ibel al-Saqi, the absence of a durable ceasefire and the ongoing occupation leave residents in limbo. Father Hani Tawk, a coordinator for Catholic organizations, stated that the aid carries symbolic weight. “When they see us, they know they are not alone,” he said, describing residents who remain caught between an unrecognized border, limited state authority, and an open-ended occupation.