Since the Israel-Lebanon ceasefire agreement, the uneasy calmness between Israel and Hezbollah has been more of a truce of exhaustion than a peace built on mutual trust. The ceasefire has temporarily halted a campaign that impacted Lebanon’s already fragile economy and displaced thousands, while Israel faced domestic and international pressures to contain a multi-front confrontation.

Yet as of late 2025, that calm is clearly deteriorating. A series of Israeli preemptive airstrikes in southern and eastern Lebanon, against Hezbollah’s “rebuilding of military capacity,” has reignited fears of a new conflict. This latest deterioration reveals a convergence of military, political, and regional pressures that could soon push both sides toward another confrontation, albeit one that may remain limited in scope, at least initially.

Hezbollah Reconstruction and Israel Red Lines

Israel’s defense establishment claims that Hezbollah has partially rebuilt its offensive infrastructure, especially short- and medium-range rocket systems destroyed during the 2024 war. Intelligence assessments suggest that smuggling routes from Syria have reopened, enabling Hezbollah to reconstitute its stockpile of Iranian-made Fateh-110 missiles and local launch systems.

From Israel’s perspective, this activity violates the ceasefire provisions currently in place as well as the UN Security Council Resolution 1701, which requires armed groups to withdraw north of the Litani River. The Israeli Defense Forces (IDF) argue that Lebanon’s government has either failed or refused to enforce these terms, a claim reinforced by US officials who describe Lebanon as “unable to forcibly disarm Hezbollah” as well as being a “failed state.”

This informs the core of Israeli concerns: that Hezbollah’s rearmament constitutes a clear and present threat, legitimizing renewed preemptive action. Recent strikes in Nabatieh and the Bekaa Valley, officially described as “preventive,” fit this logic.

Lebanon Between Statehood and Survival

The Lebanese government faces only a growing political dilemma. President Joseph Aoun and the Lebanese Armed Forces (LAF) are under growing international pressure to assert state control over the use of armed force and ensure the disarmament of Hezbollah, but the latter remains a dominant political and social actor within Lebanon’s power structure. Any attempt to forcibly disarm the group will reignite internal conflict and possibly push the country toward civil war.

This internal deadlock has increased Israel’s concerns that Lebanon cannot and will not comply with ceasefire obligations, thus resulting in a political vacuum along Lebanon’s southern border, where Israeli deterrence and Hezbollah’s armed presence uneasily coexist. Hezbollah ultimately exploits this ambiguity to portray Israeli strikes as violations of Lebanon’s sovereignty, reinforcing its domestic legitimacy as Lebanon’s actual “resistance” movement and force on the ground. Thus, both sides are locked in a feedback loop: Israel’s preventive actions justify Hezbollah’s continued militarization, while Hezbollah’s defiance justifies Israel’s preemptive strikes. The potential for escalation lies precisely in this spiral of reciprocal justification.

The Strategic Calculus in Israel

Inside Israel’s war cabinet, the debate over Hezbollah’s threat is evolving. Military planners view Hezbollah not as an isolated Lebanese problem but as part of Iran’s integrated regional deterrence network, alongside militias in Syria, Iraq, and Yemen, which altogether not only poses a threat to Israel but also to the wider Middle East stability. The recent increase in airstrikes indicates a shift toward a “mowing the grass” strategy: a systematic campaign of degradation designed to prevent Hezbollah’s capabilities from reaching its pre-2024 levels.

However, political timing is critical. Prime Minister Benjamin Netanyahu faces renewed domestic criticism over security failures in the north and ongoing instability in Gaza with regard to the reemergence of Hamas. A limited but highly publicized military operation against Hezbollah would serve both to restore deterrence credibility and to reassert political authority. The IDF’s recent rhetoric, warning that “all of Lebanon is accountable for Hezbollah’s actions,” hints at contingency planning that could escalate beyond targeted strikes.

Still, Israel’s leadership knows that a full-scale northern war would stretch its resources, especially with the increasing risk of another Israeli-Iranian confrontation. Accordingly, the prevailing doctrine is therefore likely to remain escalatory containment: intensifying pressure on Hezbollah without triggering a broader regional war, at least for the near term.

Hezbollah’s Restraint: Tactical or Strategic?

From Hezbollah’s position, restraint served its strategic depth effectively, as the group has avoided major cross-border rocket salvos since early 2025, focusing instead on capacity rebuilding and domestic political messaging. Its calculus is mainly shaped by three factors. Firstly, with Lebanon’s domestic crisis, the economy is near collapse, and another war could destroy what remains of Hezbollah’s social legitimacy. Secondly, considering Iran’s regional balancing, Tehran prefers to maintain Hezbollah as a credible deterrent against Israel, not a spent force embroiled in an unwinnable confrontation. Thirdly, with the Gaza variable, the southern front remains volatile, and thus, Hezbollah’s leadership likely views escalation as a strategic reserve option to open a second front only if Israel crosses red lines.

This cautious posture does not imply a passive course of action. Hezbollah has most likely restored parts of its command network in the Bekaa and Baalbek regions, upgraded its reconnaissance capabilities, and invested in counter-surveillance along the Blue Line. These actions suggest readiness for defensive retaliation rather than immediate offensive escalation.

The Shadow of the US Policy and Iran

Any Israeli attack on Hezbollah cannot be isolated from wider regional geopolitics. Iran has always viewed Hezbollah as its most capable deterrent proxy and has reportedly increased armament support to southern Lebanon, anticipating Israeli aggression. If Israel were to launch a major offensive, Tehran could respond through asymmetric escalation, missile launches by its militias in Syria, or maritime harassment in the Red Sea and Strait of Hormuz via the Houthis in Yemen.

Conversely, Washington’s influence remains a restraining factor. The Trump administration seeks to avoid regional escalations. US diplomats have privately warned Israel against a large-scale operation that could destabilize Lebanon and empower Iran’s hardliners. This dynamic explains Israel’s current pattern: high-tempo air operations, limited ground incursions, but avoidance of open war. It is a balance between deterrence signaling and alliance management, one that may hold, unless Hezbollah’s actions or Iran’s calculus shift dramatically, which is likely the case.

Looking Ahead

The highest likelihood is that an Israeli strike killing senior Hezbollah commanders or causing heavy civilian casualties prompts Hezbollah to launch rockets into northern Israel. The IDF would then retaliate with multi-day air operations, possibly including limited ground incursions. Both sides accept a US-brokered truce after several days of intense fighting that would allow Israel to degrade Hezbollah’s restored capabilities.

A lower likelihood is that Hezbollah, backed by Iran, opens a new coordinated campaign with precision missiles and drones. Israel would then probably respond with deep-strike operations and mobilization of reserve divisions. This outcome would devastate Lebanon and risk drawing in Iran and Iran-backed militias in Syria, a scenario all major actors are keen to avoid but cannot entirely rule out.

The lowest likelihood is that Israel continues targeted airstrikes against Hezbollah key personnel, logistical nodes, weapons convoys, and technology installations. Hezbollah responds with rhetoric and limited counterfire but avoids sustained escalation. The confrontation remains below the war threshold, while the ceasefire’s credibility would continue to erode further, probably leading to one of the first 2 mentioned scenarios sooner or later.

Risk Factors

The ceasefire agreement in place now functions less as a ceasefire and more as a mechanism for managed violence. Israel’s persistent strikes and Hezbollah’s covert capacity rebuilding ensure that the cycle of action and reaction remains unbroken. The line between deterrence and provocation grows thinner every day. The Lebanese state’s inability to enforce disarmament underscores its systemic fragility. Israel’s argument that Lebanon is effectively “Hezbollah’s host” may increasingly shape international attitudes, justifying future preemptive Israeli actions under the guise of self-defense.

Considering Israel’s regional posture, Israel’s focus on Hezbollah aligns with its broader multi-front containment strategy against Iran’s regional network. Yet it also exposes Israel to overextension: every northern escalation risks diverting resources from the main threat to Israel, Iran.

Perhaps the most dangerous factor is misperception. Both Israel and Hezbollah believe they are operating below escalation thresholds. Yet as history shows, the Middle East’s “limited” wars often begin as misunderstandings and end as strategic shocks.

The trajectory of the late 2025 series of events points toward a renewed Israeli offensive, justified under the claims of Hezbollah’s rearmament and capacity rebuilding. Whether this remains a campaign of targeted strikes or escalates into a broader war will depend on how Hezbollah absorbs the pressure and how far Israel pushes deterrence before it becomes provocation. In the short term, Israel’s leadership appears determined to enforce red lines and to demonstrate operational dominance along the northern border. In the medium term, the question is not if Israel will attack again, but when and how far it will go, unless Lebanon reclaims credible control over Hezbollah’s military assets, which seems politically impossible.