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Iran, Day 12: Joint Iran-Hezbollah Attack on Israel, Ships Struck in Strait of Hormuz
By Le Pivot — Iran Monitor · March 10, 2026 · 10 min read
Twelfth day of war. The US-Israeli military campaign against Iran, launched on February 28 following the assassination of Ayatollah Ali Khamenei, has entered its most volatile phase yet. On Tuesday, March 11, Iran and Hezbollah executed a coordinated five-hour offensive against more than fifty Israeli targets — the largest joint operation of the conflict so far. Simultaneously, commercial vessels were struck in the Strait of Hormuz, the US-led coalition expanded its bombing campaign to over 5,000 targets inside Iran, and the World Health Organization issued an unprecedented warning about toxic “black rain” falling on Iranian cities. The war is no longer contained to a bilateral confrontation — it is a regional conflagration with global consequences.
Joint Iran-Hezbollah Offensive: Five Hours, Fifty-Plus Targets
The coordinated assault launched by Iran and Hezbollah marks a significant escalation in both scale and sophistication. Over a sustained five-hour window, waves of ballistic missiles, cruise missiles, and armed drones struck more than fifty Israeli targets. Among them: the military intelligence headquarters in central Israel, the Haifa naval base, and multiple radar and air-defence installations across the country.
The operation’s duration — five uninterrupted hours — suggests a level of pre-planned coordination between Tehran and Hezbollah that Western intelligence officials had long feared but considered unlikely to materialize in practice. Unlike previous retaliatory volleys, which tended to be brief and largely intercepted, this offensive was designed to saturate Israel’s multi-layered air defences and inflict sustained damage on military infrastructure (Al Jazeera, Reuters).
Iran also extended its strikes beyond Israeli territory, hitting US military installations in Kuwait and Bahrain. The attacks on American bases signal Tehran’s determination to impose costs on Washington’s regional partners, raising the political pressure on Gulf states hosting coalition forces.
Strait of Hormuz: Maritime Escalation
In what may prove the conflict’s most consequential development, commercial vessels were struck in the Strait of Hormuz — the narrow waterway through which approximately 20 percent of the world’s oil supply transits daily. The attacks, attributed to Iranian naval forces and affiliated militias, targeted cargo and tanker traffic, effectively escalating the conflict from a land and air campaign to a maritime confrontation.
Sixteen Iranian mine-laying vessels were destroyed by US naval forces in response, part of a broader effort to keep the strait open. But the damage is done: insurance premiums for vessels transiting the Gulf have skyrocketed, and several major shipping lines have already rerouted traffic around the Cape of Good Hope — adding weeks and billions of dollars to global supply chains. The spectre of a full Hormuz closure, long considered the ultimate escalatory trigger in any Gulf conflict, is now closer than it has been since the Iran-Iraq War (Bloomberg, Financial Times).
US-Israeli Coalition: 5,000 Targets and Counting
The coalition’s bombing campaign has reached an unprecedented scale. According to Pentagon briefings, US and Israeli forces have now struck more than 5,000 targets inside Iran since the conflict began on February 28. The latest wave included Mehrabad Airport in Tehran — a dual-use facility serving both civilian and military aviation — effectively cutting off the capital’s primary air link to the outside world.
Israel simultaneously announced what it described as “large-scale” strikes against Lebanon, targeting Hezbollah infrastructure, command centres, and weapons depots. The parallel campaign in Lebanon aims to degrade Hezbollah’s capacity to sustain its offensive coordination with Iran, but it has also devastated civilian areas in the Bekaa Valley and southern Beirut (CNN, France 24).
Casualties: A Grim Accounting
The human toll of twelve days of war is staggering and accelerating.
Iran: At least 1,300 people have been killed, according to the US-based Human Rights Activists News Agency (HRANA). Approximately 10,000 civilian sites — including residential neighbourhoods, hospitals, and power stations — have been struck since February 28. Communications blackouts in several provinces make a comprehensive count impossible; the true death toll is almost certainly higher.
US forces: The Pentagon acknowledged approximately 140 American service members wounded and seven killed since the conflict began — figures that represent the heaviest US combat losses since the withdrawal from Afghanistan.
Lebanon: The Israeli campaign has killed at least 634 people and displaced more than 800,000 — a humanitarian catastrophe that echoes the 2006 war but at a faster pace. The UN refugee agency has warned that Lebanon’s already fragile infrastructure cannot absorb another mass displacement event (UNHCR, Al Jazeera).
Gulf States Under Fire
The conflict’s geographic footprint continues to expand. Saudi Arabia, Qatar, the United Arab Emirates, and Oman all reported attacks on their territory or military installations hosting coalition forces. Iran’s message to the Gulf monarchies is blunt: neutrality is not an option so long as American aircraft operate from your airfields.
For the Gulf states, this presents an impossible dilemma. Their security partnerships with the United States are foundational, but their populations — and their economies — are now absorbing the costs of a war they did not choose. Diplomatic channels between Riyadh and Tehran, which had been painstakingly rebuilt after the 2023 rapprochement brokered by China, are now severed. The regional architecture that had slowly emerged over the past three years lies in ruins (Reuters, BBC).
Environment: WHO Issues “Black Rain” Warning
The World Health Organization issued a rare emergency advisory on Tuesday, warning of toxic “black rain” falling on Iranian cities — a direct consequence of the sustained bombardment of oil refineries, fuel depots, and petrochemical facilities. The rain, laden with particulate matter, heavy metals, and volatile organic compounds, poses severe health risks to millions of Iranian civilians, particularly children and those with respiratory conditions.
WHO officials drew parallels to the oil-well fires in Kuwait during the 1991 Gulf War, but noted that the current contamination is more diffuse and harder to contain, as strikes have hit facilities spread across multiple provinces. Environmental monitoring in Iran has effectively collapsed, making it impossible to assess the full scope of air and water contamination. The long-term health consequences — including elevated cancer risks and respiratory disease — will likely persist for decades (WHO, The Guardian).
Key Takeaways
The twelfth day of war marks a qualitative shift. The joint Iran-Hezbollah offensive against Israel demonstrates that Tehran retains the capacity to coordinate complex, multi-front attacks despite twelve days of relentless coalition bombardment. The strikes on commercial shipping in the Strait of Hormuz threaten to transform a regional military conflict into a global economic crisis. With over 1,300 dead in Iran, 634 killed in Lebanon, and American casualties mounting, the pressure for a diplomatic off-ramp is intensifying — but so is the logic of escalation. The WHO’s black rain warning adds an environmental dimension that will outlast any ceasefire. As one senior European diplomat told reporters on Tuesday: “We are past the point where this conflict can be contained. The only question now is how much damage it does before it stops.”