When bombs fell on Iran on Saturday morning, it marked more than another episode in a protracted regional rivalry. It signalled the collapse of plausible deniability, the point at which decades of hostility hardened into the overt logic of open war. In the first hours of this operation, Ayatollah Ali Khamenei, Iran’s supreme leader since 1989, was killed along with other senior military officials.

Khamenei embodied the ideological core of Iran’s post-revolutionary state, a figure whose long rule fused domestic repression with expansive regional defiance. The striking of his leadership compound by American and Israeli airpower was an unmistakable hinge in a long series of hostilities that had, until this weekend, avoided such a direct blow.

Once the apex of the Iranian state was eliminated by foreign airpower, retaliation ceased to be a question of if and became a question of where. The answer would not remain confined to Tehran or Tel Aviv.

The Story That Made War Possible

For years, the case for confrontation had already been laid, and at its centre stood the claim of nuclear imminence. Successive Israeli governments, most consistently under Benjamin Netanyahu, warned that Iran was on the threshold of weaponisation, that the clock was running out, and that the opportunity to act was closing.

Ironically, such warnings stretch back decades. Each instance intensified the sense of urgency, yet each passing year quietly extended the deadline.

Alongside the nuclear narrative sat a second line of argument: pre-emption. Marco Rubio framed the intervention as necessary because Israel was prepared to strike and Iranian retaliation would inevitably follow, placing American personnel and assets at risk. In that account, Washington decided to move first along with Israel in order to manage the sequence of escalation.

Pre-emption, in this interpretation, becomes a question of timing, and it’s clear that the United States entered a war structured by another state’s strategic calculations only to describe that entry as something inevitable.

If Netanyahu effectively drew the United States into this war, it raises a broader question about whether Washington is acting in accordance with its own strategic interests in the region. At the very least, it suggests that American decision-making is deeply entangled with and ultimately constrained by Israeli objectives—if that was not already evident.

The Spillover

Although shaped by Israeli interests, once the war began the violence refused to remain contained. It radiated outward, spilling far beyond Iran’s borders and the Israeli front, pulling the wider region into its expanding orbit of fire and retaliation. The initial U.S.-Israeli strikes rapidly triggered an Iranian retaliation that unfolded across a networked battle space.

Tehran launched missiles and drones that struck at multiple countries in the region, including Bahrain, Kuwait, Qatar, the United Arab Emirates and Saudi Arabia, targeting both allied military facilities and infrastructure such as ports and oil zones.

In Bahrain, for example, Iranian missiles and drones struck near Manama and even hit the U.S. Fifth Fleet headquarters, while a worker was killed by debris falling near a port installation.

In Kuwait, Iranian drones hit the international airport and bases housing foreign forces and there were reports of U.S. aircraft being downed in a friendly-fire incident. In Oman, Iranian drones targeted key facilities at Duqm Port and along shipping routes, resulting in casualties among oil tanker crews.

Beyond direct strikes, the conflict drew local actors deeper into the violence. In Lebanon, the Iranian-aligned militia Hezbollah began firing rockets and drones into Israeli territory in response to Tehran’s losses and to show solidarity with its leadership, prompting heavy Israeli bombardment of positions and urban areas there.

A surge in attacks by Iranian proxy elements in Iraq also added complexity to the regional war, with explosions affecting areas around Baghdad and the Kurdistan Region. As a result of these interconnected attacks, countries that had not sought to be parties to the original confrontation found themselves under fire, with diplomatic missions targeted and airspace closed, disrupting travel and commerce across the Gulf.

Spreading the Cost of War

If the immediate objective was retaliation, the broader aim appears more strategic. Iran’s strikes across the Gulf were not confined to symbolic blows against Israel. They were designed to transmit instability outward, to make the cost of war regional rather than bilateral.

The message is implicit yet unmistakable: continued operations against Iran will dissolve the relative calm and economic predictability that many Gulf states have cultivated over the past decade. In this framing, escalation becomes leverage. Tehran cannot match American airpower symmetrically, so it expands the battlespace politically and economically.

This approach places Gulf governments in a dilemma. If they interpret the conflict as a war initiated by Washington and Jerusalem, then deeper alignment with US operations risks domestic backlash and economic exposure. If they pursue de-escalation, they risk appearing unreliable security partners.

Iran’s calculation seems to be that proximity and vulnerability will push some states toward restraint. By demonstrating reach through missile and drone capabilities, Tehran reinforces its long-standing “forward defence” doctrine: conflict should be felt far from its own borders, across ports, airfields and energy hubs that underpin regional prosperity.

However, the strategy carries significant risk. Escalation may instead harden Gulf alignment with Washington and intensify military pressure on Iran. Missile arsenals are finite; sustained high-tempo retaliation is difficult to maintain. Other regional actors could choose endurance over engagement, waiting for Tehran’s capacity to diminish.

Ultimately, Iran’s objective appears to centre on deterrence through diffusion. If it cannot prevent attack, it can ensure that attack carries distributed consequences. The war thus becomes a contest over who can better withstand instability: a coalition with superior firepower or a regime betting that regional discomfort will fracture that coalition first.

For the Islamic Republic, this war carries existential weight. By widening the theatre, Tehran is communicating that any attempt to dismantle its leadership or degrade its command structure will reverberate far beyond its borders. If the regime faces destruction, it intends to ensure that the surrounding order fractures alongside it.

At a minimum, Iran seeks to generate political cost for every government drawn into the conflict. Gulf states must weigh economic exposure against alliance commitments. Washington must justify escalation to an already extremely sceptical public. Israel must absorb sustained pressure on multiple fronts.

The regime’s wager is that cumulative instability will strain these actors faster than it exhausts its own capacity. Whether that wager succeeds depends on time. The decisive question is not simply how hard Iran can strike, but whether it can endure long enough for regional discomfort to translate into diplomatic restraint or a substantial coalition fracture.