Israel declares a forward defence line in southern Lebanon — Key Events — Levant

What happened

The IDF declares a "forward defence line" in southern Lebanon, which Israel also calls the "Yellow Line". According to the UN Secretary-General's report, an IDF map of 19 April shows an area up to 10 km north of the Blue Line, including some territory north of the Litani and some 55 Lebanese villages, and a band at sea north of the agreed maritime border; a June map shows it expanded. Israel says it has no territorial ambitions in Lebanon.

Israel's presence in Lebanon grew from five positions to a zone of tens of villages, and its reduction is now what the Trilateral Framework's withdrawal-after-disarmament sequence is about. The module never draws the line, which has no agreed geometry, and keeps it distinct from the Gaza Yellow Line.

Confidence: High

WhenApr 2026 (IDF map 19 Apr)

KindMilitary · Territorial change

ArenaIsrael–Lebanon / Blue Line

Confidence: High Sources: UN Security Council resolutions, Secretary-General reports and meeting records (Levant)↗ · Israel Defense Forces — Spokesperson's Unit announcements ↗ · Security Council Report — monthly forecasts ↗ Methodology Corrections

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Watch questions this event bears on

Standing analytical questions whose evidence runs through this event, each with its latest review. Derived from the Watch object, never restated here.

Military2026-10-12Is the Israel–Lebanon Framework's zone-by-zone sequence moving — Israeli forces leaving named areas and the Lebanese army entering them — or is the Israeli-held area holding or growing?Baseline

Connected records

3 records that this event names, or that name it — every one an explicit reference in a published record, nothing inferred from subject matter.

Part of1

Campaigns whose record places this event inside them.

Lebanon war 2026The forward defence line

Actors2

Actor records this event names.

Where this fits

This is one entry in the Levant timeline. The full Key Events surface carries every dated turning point with its filters and its essential subset, and this event in place shows what came before and after it. How Vigil grades, dates and sources its claims is set out in the methodology.