The IDF destroyed Hezbollah’s vast underground infrastructure beneath the strategic Ali al-Taher Ridge in southern Lebanon. What is your most up-to-date and in-depth assessment?
ME-100, Middle East Chief:
ME-100 assessment — updated 11 September 2026: The destruction of the Ali al-Taher complex is more consequential than the headline “Israel destroyed a Hezbollah tunnel” suggests. Israel says it detonated more than 1,100 tons of explosives on 10 September, destroying two tunnel routes extending over 2 km, after weeks of ground operations that had already given the IDF operational control above and below the ridge. The military says it found rockets, drones, anti-tank missiles, mines and a Badr-unit command complex with command-and-control, storage and living facilities; the explosion was powerful enough for the U.S. Geological Survey to register a 4.1-magnitude seismic event. These are Israeli military claims, and independent access to the underground complex remains limited, so the exact scale of what was destroyed should be treated cautiously.
The strategic significance is real, but it is geographical more than numerical. Ali al-Taher sits roughly 15 km from Israel and around 600 metres above sea level, overlooking approaches toward Nabatieh while connecting the southern defensive belt with the Iqlim al-Tuffah area. In Hezbollah’s architecture, this was not simply another weapons cache: the Badr command structure reportedly made the ridge a node linking observation, logistics, weapons storage and underground survivability. Its position also complements the Beaufort Castle massif. Reuters reporting indicates that the ridge had been suspected of containing underground command and weapons facilities and that Hezbollah’s infrastructure there was designed as part of its deeper defensive system.
But here is the distinction that matters: Israel has destroyed a major node of Hezbollah’s southern military architecture, not Hezbollah’s military architecture itself. The underground model exists precisely to absorb losses of individual facilities. Hezbollah can disperse command functions, relocate personnel, rebuild access shafts and substitute mobile rockets/drones for fixed infrastructure. The more serious Israeli achievement is therefore not the number of tunnels destroyed; it is that the IDF has physically occupied the high ground and is attempting to prevent reconstruction. Israel has already described the operation as completing its control of the ridge and has indicated that it intends to remain inside its self-declared security zone.
The deeper game: Israel is changing the map before negotiating
This is where the operation becomes strategically important. Israel’s leverage is rising because it is converting a ceasefire from a static line into a territorial-security reality. The June U.S.-brokered framework envisaged Israeli withdrawal alongside Hezbollah disarmament and greater Lebanese state control, but implementation has stalled. Ali al-Taher demonstrates Israel’s negotiating logic: we will not withdraw from terrain that we believe can again become a Hezbollah military platform; instead, we will physically dismantle the platform first.
That creates an uncomfortable paradox for Beirut. The Lebanese Army wants state authority restored, but continued Israeli occupation makes that politically harder; simultaneously, Hezbollah’s refusal to surrender the ridge allows Israel to argue that Lebanese sovereignty cannot yet guarantee Israeli security. The result is a self-reinforcing sovereignty trap: Hezbollah’s survival justifies Israeli presence, while Israeli presence strengthens Hezbollah’s argument that armed resistance remains necessary. This is the old Lebanese-Israeli oscillation returning in a new form.
Who benefits?
Israel benefits immediately. It gains terrain, intelligence, denial of a major Hezbollah position, and—more importantly—a physical bargaining chip. The destruction also gives Netanyahu’s government a highly visible demonstration that the IDF can penetrate and permanently dismantle infrastructure that Hezbollah spent years constructing. That has domestic political value as well as military value, particularly with Israeli politics approaching an electoral cycle. Reuters specifically notes the political importance of the ridge, while Hezbollah has sought to portray its loss as less consequential.
Iran loses a particularly valuable investment, but not necessarily the strategic contest. If Israel’s claim that the network was developed over decades with Iranian financing and planning is broadly correct, Ali al-Taher represents the destruction of accumulated Iranian capital: engineering, weapons storage, command infrastructure and institutional knowledge. But Iran’s advantage has always been that it can regenerate asymmetric capabilities more cheaply and clandestinely than Israel can permanently police every mountain in Lebanon. Thus Tehran’s likely calculation is not to defend every lost tunnel; it is to ensure that Hezbollah remains sufficiently armed and politically embedded that Israel cannot convert tactical victories into strategic disarmament.
Hezbollah loses operational depth and prestige. The Badr network appears to have been sufficiently important that losing it hurts command-and-control and local mobility. But politically, Hezbollah has another incentive: it cannot afford to acknowledge that Israel can systematically dismantle its supposedly impregnable underground architecture. Hence the minimization of Ali al-Taher’s importance is itself strategic messaging. The group needs to preserve deterrence psychologically even when infrastructure has been physically degraded.
The most important warning
I would not interpret Ali al-Taher as the beginning of Hezbollah’s collapse. I would interpret it as evidence of a more profound transition: Israel is attempting to move from “deterrence against Hezbollah” to “denial of Hezbollah’s ability to regenerate south of the Litani.” That is a much more ambitious objective. If Israel can combine permanent observation, control of dominant terrain, destruction of subterranean infrastructure and interdiction of resupply, Hezbollah’s traditional model—hide, regenerate, emerge after Israeli withdrawal—becomes substantially harder. But if Israel remains indefinitely in Lebanon, the military achievement can reproduce the very political conditions that historically regenerate Lebanese armed resistance.
My forecast: Ali al-Taher is likely to become a precedent rather than an isolated operation. Expect Israel to use the ridge as proof that the security zone must remain until Hezbollah is demonstrably disarmed, while Hezbollah will seek to make Israeli occupation increasingly costly without necessarily attempting an immediate large-scale confrontation. The decisive contest therefore shifts from “Who controls Ali al-Taher?” to “Who controls the postwar definition of southern Lebanon?” If Beirut and Washington can put Lebanese Army forces into the vacated areas while Israel receives credible verification against Hezbollah reconstitution, this operation could ultimately become part of a new equilibrium. If not, Ali al-Taher becomes another iteration of the region’s historical cycle: Israel occupies high ground to obtain security → Lebanese sovereignty is weakened → Hezbollah or its successor exploits the sovereignty vacuum → Israel concludes that withdrawal was premature. The tunnel has been destroyed; the strategic dilemma underneath it has not.
Three Corporate bottom line: Israel won the tactical battle decisively; Hezbollah suffered a meaningful operational defeat; Iran lost an expensive strategic asset; but nobody has yet solved the sovereignty problem.The real measure of Israeli success will be whether Ali al-Taher remains unusable five years from now, not whether it exploded spectacularly yesterday. The 1,100-ton demolition is therefore less important than what happens after the dust settles.
Welcome to the Middle East, where everything changes, yet nothing does.
ME-100, Middle East Chief
Three Corporate