Under Khamenei’s direction, Iran built a far-reaching network of influence stretching from the eastern Mediterranean to its own borders — funding, arming, and politically supporting groups including Hezbollah in Lebanon, Hamas in Gaza, and various militias in Iraq and Syria. That network is now leaderless at its apex, even as several of its key components have already been severely weakened.
The erosion of Iran’s regional influence began well before Khamenei’s death. Israel’s prolonged military campaign devastated Hezbollah’s leadership structure and effectively dismantled much of Hamas’s military capacity in Gaza. The fall of Syrian President Bashar al-Assad, a long-standing Iranian ally, removed another pillar of Tehran’s strategic architecture.
The June airstrikes by the United States and Israel exposed deep vulnerabilities in Iran’s air defenses and demonstrated Israel’s overwhelming military superiority in the region. These strikes, which were followed by the January crackdown and now Khamenei’s death, represent a cascading series of blows to the Islamic Republic’s regional ambitions.
What remains of the network is now operating without centralized direction from Tehran, at a moment when Tehran itself is consumed by leadership transition and active conflict. Iraq-based militias, Houthi forces in Yemen, and remnants of Hezbollah face the question of whether to continue operations or await new instructions.
The long-term fate of Iran’s regional influence will depend heavily on who succeeds Khamenei and what strategic priorities the new leadership adopts. A decision to scale back foreign entanglements in exchange for sanctions relief might reshape the Middle East more profoundly than the airstrikes themselves.