Can Iran retaliate without crossing the red line? Trump’s strike forces Tehran’s hand

In the aftermath of the U.S. bombing of Iran’s key nuclear sites at Fordow, Natanz, and Esfahan, Tehran faces a difficult strategic question: can it respond without provoking a regional war it cannot win? With pressure mounting from internal factions and external adversaries, Iran’s decision is likely to shape the Middle East’s next phase of conflict and diplomacy.

On Saturday, June 21, President Donald Trump announced that the United States had conducted a “very successful” military operation against Iran’s underground nuclear facilities. The operation reportedly used a full payload of bombs against the Fordow site, with Trump declaring that “Fordow is gone” and urging Iran to now “agree to end this war.” The strikes were endorsed by Israeli Defense Minister Yoav Gallant and applauded by Trump’s domestic base, but they have pushed Iran into a corner where silence may signal weakness—and escalation could mean disaster.

What are Iran’s likely military options and how might it strike without triggering full-scale war?

Analysts say Iran’s leadership will feel compelled to respond, but their options are constrained. Limited military retaliation—such as missile or drone attacks on U.S. bases in Iraq, Syria, or the Persian Gulf—remains the most likely scenario. Iran’s arsenal includes short- and medium-range missiles like the Qassem Bassir, which have improved precision and mobility. These systems allow Iran to carry out targeted strikes while avoiding mass casualties.

Another plausible avenue is maritime disruption. The Iranian Revolutionary Guard Corps Navy has previously used mines, drone swarms, and fast boats to interfere with shipping in the Strait of Hormuz, a chokepoint through which nearly a third of global oil passes. While such actions would signal defiance, they would stop short of direct confrontation with the U.S. mainland or Israel, thereby maintaining plausible deniability and avoiding crossing Washington’s military red line.

Could Iran use its proxies to retaliate while avoiding direct attribution?

Iran has a long history of using proxy forces across the Middle East to wage asymmetric warfare. Hezbollah in Lebanon, Kata’ib Hezbollah in Iraq, and Houthi militants in Yemen all maintain varying levels of alignment with Tehran. Some experts suggest that these groups could be activated to conduct attacks against Israeli, U.S., or Saudi interests, giving Iran a buffer from direct attribution.

However, recent military and intelligence campaigns have degraded some of these proxy capabilities. Hezbollah, in particular, has suffered setbacks due to Israel’s countermeasures in southern Lebanon. Still, U.S. officials remain alert to the possibility that Iran might encourage cyberattacks, proxy assaults on embassies, or kidnappings of foreign nationals as lower-profile methods of retaliation.

Could Tehran escalate its nuclear program instead of using military force?

A non-kinetic but symbolically powerful option for Iran would be to further escalate its nuclear program in response to the U.S. strikes. Tehran could increase uranium enrichment levels, limit access to International Atomic Energy Agency (IAEA) inspectors, or even formally withdraw from the Non-Proliferation Treaty (NPT).

Such moves would represent a serious breakdown in international norms and signal that Iran is moving closer to weaponization. This would likely prompt immediate sanctions from Europe, further isolate Tehran diplomatically, and potentially provoke another round of airstrikes from either the U.S. or Israel. However, hardliners in Iran may see this as a more controlled form of escalation that increases their bargaining power in any future negotiations.

What political and diplomatic pressures is Iran facing after the U.S. bombing?

Iranian officials have already begun leveraging international platforms to denounce the U.S. strikes as a “very dangerous” provocation. Foreign Minister Hossein Amir-Abdollahian warned at the United Nations that the airstrikes could “ignite a larger regional fire.” At the same time, Iranian diplomats are privately lobbying European governments to condemn the attack and pressure Washington to de-escalate.

Domestically, Iran’s leadership is balancing public expectations with geopolitical constraints. After the strike on Fordow, hardline factions within the Islamic Revolutionary Guard Corps (IRGC) are reportedly demanding a swift and forceful response. However, others within President Ebrahim Raisi’s administration are said to be counseling caution, warning that Iran could find itself isolated or drawn into a war it cannot control.

How does the current situation compare to past U.S.–Iran confrontations, and what are the risks of miscalculation?

The current crisis bears resemblance to the aftermath of Qassem Soleimani’s assassination in January 2020. Then, too, Iran retaliated with missile strikes against U.S. bases in Iraq—causing traumatic brain injuries but no deaths—and then stood down. That calibrated response avoided a broader conflict.

The danger now is that the stakes are higher. Trump’s strike targeted nuclear infrastructure—a red line for Iran’s leadership. Any Iranian miscalculation, such as a strike that results in American casualties or hits Israeli territory directly, could prompt a U.S. or Israeli counterstrike far more devastating than Tehran anticipates.

Some experts, like Ali Vaez of the International Crisis Group, suggest Iran is facing a narrow window in which it must act to preserve credibility. If it waits too long, it may appear weakened. If it overreaches, it may lose control of the escalation ladder.

What are the most plausible retaliation scenarios and what should the world be watching for next?

Iran may choose to launch precision missiles or drones targeting U.S. bases in Iraq or Syria, framing the action as justified retaliation while deliberately calibrating the attack to avoid American casualties. This approach would allow Tehran to demonstrate resolve without triggering a disproportionate military response from Washington. Alternatively, Iran could escalate at sea by disrupting maritime shipping through acts of sabotage or coordinated drone swarms in the Strait of Hormuz—a strategy that has previously proven effective in unsettling global oil markets without inviting direct military retaliation.

Another plausible path involves Iranian-backed militias executing limited rocket or drone strikes on U.S. assets or key infrastructure belonging to Gulf allies. In such cases, Iran would likely deny direct responsibility, maintaining strategic ambiguity while signaling its reach and deterrence capability. On the nuclear front, Tehran could respond by announcing that it will enrich uranium beyond the 60% threshold, placing renewed pressure on International Atomic Energy Agency monitors and withdrawing from stalled diplomatic talks. This option would dramatically raise alarm among non-proliferation advocates and Western powers.

Finally, Iran might opt for asymmetric tools such as cyberattacks targeting critical infrastructure or orchestrated hostage diplomacy involving foreign nationals. These lower-risk, deniable actions could allow Tehran to deflect domestic pressure while avoiding immediate kinetic confrontation with the United States or Israel.

Could U.S. deterrence, international pressure, or internal politics stop Iran from retaliating?

Despite strong rhetoric, several factors may discourage an immediate or large-scale Iranian response. The presence of U.S. naval forces and air defense systems across the Gulf states raises the cost of military adventurism. Trump’s vow that “any retaliation will be met with force” adds to the deterrence calculus.

International condemnation of the strikes has been mixed, but many global powers—including Russia and China—have warned against further military escalation. Within Iran, the economic cost of another war amid sanctions, inflation, and social unrest could push decision-makers to seek a non-military path forward.

Will Iran step back or push the conflict into a dangerous new phase?

Strategically, Iran finds itself in a familiar dilemma: retaliate and risk war, or stand down and invite internal criticism. The Islamic Republic’s pattern of strategic patience and asymmetric response suggests a calibrated, delayed retaliation is likely—unless new U.S. or Israeli actions force a faster timetable.

In either case, the global security environment now hinges on Tehran’s next move.