US Intelligence Says Even Large-Scale US Attack Won't Topple Iran

A classified National Intelligence Council assessment, completed roughly a week before U.S. and Israeli forces began their Feb. 28 campaign, concluded that even a large-scale U.S. military assault would be unlikely to topple Iran’s ruling system.

“Plumes of smoke rise from US-Israel strikes on Tehran, Iran, March 6, 2026 (Vahid Salemi/AP) UPDATE 1752 GMT: The US National Intelligence Council assesses that the US-Israel war is unlikely to topple Iran’s regime”

EA WorldView

Multiple outlets report the NIC judgment that Iran’s clerical and military leadership is entrenched and resilient, with the study explicitly finding that a major offensive probably would not produce regime change.

EA WorldView

The finding has been cited across reporting as a central intelligence conclusion that complicates stated U.S. goals.

The report modeled a range of options, from narrowly targeted strikes on leaders and institutions to broader, large-scale assaults, and assessed how Iran's institutions would react.

Reporting says the NIC judged that Iran's clerical and military leadership would activate continuity protocols if top figures were killed, and that even an assassination of Supreme Leader Ayatollah Ali Khamenei would probably be absorbed without producing an opposition takeover.

madhyamamonline

The assessment drew on and echoed earlier CIA judgments that regime change was improbable under the attack scenarios it evaluated.

At the same time, reporters note important limits to the report’s scope: it did not fully model several alternative scenarios that analysts and policymakers have discussed, including a U.S. ground invasion, the arming of insurgent groups, or the long-term effects of sustained occupation.

“War in theMiddle East Advertisement Supported by Intelligence officials have been skeptical that a popular uprising could dislodge the Islamic Revolutionary Guards Corps, which controls much of Iran’s security apparatus”

New York Times

Several pieces highlight that those unmodeled options could materially alter the assessment’s conclusions and that the NIC explicitly omitted some courses of action from its calculations.

That methodological conclusion landed amid active military and political developments: several outlets report the Trump administration nonetheless authorized large joint U.S.–Israeli strikes (including an operation that killed Supreme Leader Khamenei), even as White House officials described goals of degrading missile, naval and proxy capabilities.

Reporting captures the tension between intelligence caution about regime collapse and the administration’s public warnings, threats, and subsequent military operations across the region.

The Jerusalem Post

Analysts and regional reporting highlight the core drivers of the NIC’s judgment: Iran’s institutional resilience, the central role of the Islamic Revolutionary Guard Corps in security and succession, and the fragmentation of opposition forces.

“A classified National Intelligence Council report, completed about a week before the Feb”

The Mirror US

Experts cited in coverage describe the assessment as reflecting a long-standing, institution-level view of Iran’s resilience, while reporting on succession dynamics notes IRGC influence, the Assembly of Experts’ formal role, and internal contestation over figures such as Mojtaba Khamenei.

The Mirror US

Those same sources underline remaining uncertainties and warn that different, unmodeled scenarios could produce markedly different outcomes.