Lebanon–Israel: Military Escalation Weakens State Authority and Signals Strategic Shift

• Renewed conflict between Israel and LH is deepening Lebanon’s instability, raising the risk of a return to political, economic, and military breakdown.

• Israel is implementing a fait accompli strategy—creating a new reality on the ground by force—to establish a de facto buffer zone, reshaping the security landscape without formal agreements.

• Lebanon’s reform and stabilization window is narrowing as conflict dynamics risk outpacing the state’s ability to consolidate political authority and security control.

• The current trajectory points toward a prolonged and structurally embedded conflict along the Israel–Lebanon border. 

The ongoing fight between Israel and LH is reshaping the strategic landscape in Lebanon, narrowing the already fragile window for state reassertion while increasing the likelihood of a more entrenched and dangerous security environment. This trajectory has been shaped in part by the 2024 Israel–LH conflict, which significantly degraded LH’s operational capabilities, culminating in the death of Hassan Nasrallah and the destruction of key military infrastructure.

While a ceasefire was nominally reached in November 2024, it was never fully implemented, with Israel maintaining a pattern of targeted strikes and forward positioning along the border. In the meantime, LH remained active but operated with reduced cohesion and strategic clarity.

This weakening continues to create a political opening in Lebanon, albeit one that is increasingly contested by evolving security dynamics. The election of President Joseph Aoun, former Commander-in-chief of the Lebanese Armed Forces (LAF), and the appointment of Prime Minister Nawaf Salam, former President of the International Court of Justice, in 2025 marked a shift toward institutional reform and international engagement. Before the ongoing fighting between Israel and LH, Lebanese government initiatives had focused on reasserting state sovereignty, including plans for the phased disarmament of LH and the redeployment of the LAF into historically contested areas. However, these efforts remain highly contingent on security conditions and external constraints, notably the scheduled end of the mandate of the United Nations Interim Force in Lebanon (UNIFIL), which has long monitored the border, in late December 2026.

Lebanon’s political transition is real but fragile, with reforms dependent on a stable security environment that no longer exists. The LAF faces a critical test of credibility as it seeks to replace both LH and international peacekeepers as the primary security actor. 

Since March 2, LH has resumed rocket fire into northern Israel, prompting an immediate and sustained Israeli response. Airstrikes and drone operations have intensified across southern Lebanon, turning the border region into an active and persistent conflict zone.  

On March 24, Israel announced a ground offensive aimed at establishing a “forward defensive line” extending to the Litani River. This implies the creation of a buffer zone equivalent to roughly 10 percent of Lebanese territory. Israeli forces have systematically targeted critical infrastructure, including major bridges, water systems, and healthcare facilities, effectively preventing the return of displaced populations. This approach mirrors Israeli strategies observed in the Golan Heights and in the Palestinian Territories, where incremental territorial control is established through military presence and infrastructure denial. The objective appears to be the creation of irreversible “facts on the ground,” prioritizing long-term territorial control over negotiated stability.  

The current trajectory points toward a prolonged and structurally embedded conflict along the Israel–Lebanon border. The establishment of a deep Israeli buffer zone would not only undermine Lebanese sovereignty but also risk triggering broader regional reactions.

Domestically, Lebanon faces renewed political weakening. The inability of the state to prevent territorial encroachment or protect civilian populations could erode public trust in the government and strengthen alternative power structures. The planned withdrawal of UNIFIL adds another layer of uncertainty, as no clear replacement mechanism currently exists to stabilize the border.

Over the medium term, the Lebanese security environment will depend on whether the Lebanese state—particularly via the LAF—can establish itself as a credible security authority that exercises unified control across national territory. Failure to do so would likely entrench a new status quo defined by Israeli-controlled buffer zones, persistent targeted strikes, and diminished Lebanese sovereignty. 

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