22 June 2025

How Iran Lost Tehran’s Hard-Liners Squandered Decades of Strategic Capital and Undermined Deterrence


On June 12, Israel unleashed a series of strikes that damaged Iranian nuclear facilities and missile sites, destroyed gas depots, and, critically, killed scores of top regime officials. Iranian Supreme Leader Ali Khamenei remains alive. But his most important deputies—including Mohammad Bagheri, the chief of staff of the armed forces, and Hossein Salami, the commander in chief of the Islamic Revolutionary Guard Corps—are dead.

A few years ago, the sudden, near-simultaneous killing of Bagheri, Salami, and a host of other senior leaders would have been unthinkable. Over three decades, the hard-liners who control Iran’s regime had built up what seemed like a formidable system of deterrence. They stockpiled ballistic missiles. They developed and advanced a nuclear enrichment program. Most important, they established a network of foreign proxies that could routinely harass Israeli and U.S. forces.

But Iran’s hard-liners overplayed their hand. After Hamas attacked Israel on October 7, 2023, the regime’s leaders opted for a campaign of maximum aggression. Rather than letting Hamas and Israel fight it out, they unleashed their proxies at Israeli targets. Israel, in turn, was compelled to expand its offensive beyond Gaza. It succeeded in severely degrading Hezbollah, the most powerful of Tehran’s proxy groups, and eviscerating Iranian positions in Syria—indirectly contributing to the collapse of the Assad regime. Iran responded to this aggression by unleashing the two largest ballistic missile attacks ever launched against Israel. But Israel, backed by the U.S. military and other partners, repelled those attacks and incurred little damage. It then struck back.

With that, the foundation of Iran’s deterrence strategy crumbled. Its ruling regime became more vulnerable and exposed than at any point since the Iran-Iraq War of the 1980s. And Israel, which has dreamed of striking Iran for decades, had an opportunity it decided it could not pass up.

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