As Israel’s invasion of Lebanon and the confrontation between Iran and Israel increase in intensity, Hezbollah finds itself needing to assert itself in the face of Israel. While Israel’s ground invasion allows Hezbollah to make some gains on the battlefield due to the group’s vast experience in asymmetrical ground warfare, the bigger picture is one where Hezbollah and Iran’s network of proxies in the region are facing their greatest-ever threat. At the heart of those threats is the extent of Israel’s infiltration of those groups.
Hezbollah never thought the day would come when its leader, Hassan Nasrallah, was killed in a multipronged campaign by Israel targeting Hezbollah’s security and military capabilities. Much to the surprise of many observers, Nasrallah was killed in the heart of Beirut’s southern suburb on 27 September, where he was holding an underground. Israel made a big deal of announcing that his targeting was based on verified field information. This indicates a high level of infiltration of Hezbollah through not just technology but also human intelligence.
Israel managed to reach Nasrallah’s bunker, which was several floors below the ground, which highlights the immense capability of its air power. Perhaps more crucially, Israel had taken the decision to eliminate Nasrallah after almost two decades of perceived equilibrium in the relationship between Israel and Hezbollah. But it seems that the Lebanese militant group had taken that status quo for granted while vastly overestimating its own strength and underestimating the extent to which Israel would go after it.
Nasrallah’s killing is, therefore, about more than the elimination of a leader. It reveals the level of Hezbollah’s weakness and miscalculations in the face of Israel, having been dealt a swift series of military, security, and psychological blows from which the group will not recover.
It has also instilled panic within Iran’s network of proxies in Iraq, Syria, and Yemen. That Israel managed to humiliate Hezbollah so greatly means that other Iran-backed groups will now be rethinking their own status and next steps. With the first anniversary of Hamas’s 7 October assault on Israel looming, Iran's proxies may choose to prioritise self-preservation over a flagrant display of power in support of Hamas.
Inward shift
It is plausible that Iran-backed groups were planning a symbolic display of solidarity with Hamas to commemorate the passing of one year since its unprecedented attack on Israel. But after the disarray caused by the communication device attacks on Hezbollah members, those groups began shifting their resources inwards instead. They reason that if Hezbollah—the crown jewel of Iran's "axis of resistance"—could be infiltrated and exposed, then other entities in Iran’s network which are not as strong as Hezbollah could be even more vulnerable.
This has led to growing panic among the groups regarding their own security and standing, which has only peaked following the killing of Nasrallah. Iran-backed militias are concerned about whether Israel could be planning to widen the scope of its targets once it is satisfied with the results of the campaign in Lebanon.
Hezbollah has a significant presence in Syria, and it is likely that Israel will shift its attention there afterwards. In Yemen, Hezbollah has been the Houthis’ main mentor, having more influence over the group than the Iranian Revolutionary Guards Corps.
In Iraq, Iran has been trying to restore unity among its militias. Trust among Iraqi Shiite actors was already eroded after the discovery of an Iran-backed spy network operating within the Iraqi prime minister’s office in Baghdad and targeting politicians who Iran’s Iraqi allies consider to be opponents or competitors.
What happened in Lebanon only adds to the prevailing mistrust. A similar concern about compromised security and moles is shared across Iran’s other proxies in the region.