US Launches 'Most Intense' Strike Day on Iran Amid Escalating War

On the morning of March 10, 2026, Defense Secretary Pete Hegseth stepped before reporters at the Pentagon and made a promise that has become grimly routine in the ten days since American bombs first fell on Tehran: today, he said, would be "yet again, our most intense day of strikes inside Iran" — with "the most fighters, the most bombers, the most strikes" the campaign has yet seen [1].

Behind the escalating rhetoric lies a conflict that has reshaped the Middle East with startling speed. What began on February 28 as a joint US-Israeli operation targeting Iran's nuclear program and military leadership has metastasized into a multi-front regional war spanning at least a dozen countries, sending oil prices above $126 per barrel, displacing hundreds of thousands of civilians, and killing thousands — including at least seven American service members [2][3].

How the War Began

The roots of Operation Epic Fury stretch back months before the first missile was launched. In late December 2025, Iran was rocked by mass protests triggered by the collapse of the rial and soaring inflation. Authorities responded with lethal force — Human Rights Watch documented security forces shooting protesters in the head and torso — and on January 8, 2026, the regime cut all internet access to the country [4].

As Iran turned inward, external tensions escalated. On February 3, six Islamic Revolutionary Guard Corps Navy gunboats attempted to seize a US tanker in the Strait of Hormuz, forcing the USS McFaul to escort it to safety. The incident triggered the largest American military buildup in the Middle East since the 2003 invasion of Iraq [4].

The final diplomatic effort came on February 25-26 in Geneva, where US and Iranian negotiators met under Omani mediation for high-stakes nuclear talks. They ended without a breakthrough [5]. Two days later, on the evening of February 27, President Donald Trump authorized Operation Epic Fury. By 9:45 a.m. Tehran time on February 28, American cruise missiles and Israeli fighter jets — approximately 200 aircraft in what the Israeli Air Force called its largest combat sortie in history — were striking targets across Iran [6].

The Assassination of Ali Khamenei

The opening salvo achieved what no American military operation had attempted since the 2011 killing of Osama bin Laden: the targeted assassination of a head of state. Ali Khamenei, Iran's supreme leader for 37 years, was killed in Israeli airstrikes on his compound in Tehran, along with his daughter, son-in-law, grandchildren, and daughter-in-law [7]. The intelligence for the strike came from the CIA, which had pinpointed the location of several senior Iranian leaders [7].

Iran initially refused to confirm Khamenei's death, but state media acknowledged it on March 1. On March 8, the Assembly of Experts named his son, Mojtaba Khamenei — a cleric with deep ties to the IRGC but lacking his father's religious credentials — as the new supreme leader [8]. The appointment was widely interpreted as a signal that Iran's hardliners intended to fight on rather than sue for peace.

The Scale of Operation Epic Fury

The Pentagon's stated objectives for the operation are threefold: destroying Iran's missile stockpiles and manufacturing capability, eliminating the Iranian Navy, and "permanently denying Iran nuclear weapons" [1]. By Day 10, the numbers told a story of enormous destructive force:

• More than 5,000 targets struck by US forces across Iran, according to CENTCOM [1]
• The Israeli Air Force separately struck 500 military targets in western and central Iran on the first day alone [6]
• Over 50 Iranian naval vessels destroyed or disabled [9]
• A 90% reduction in Iranian missile launches compared to the war's opening days [1]
• One-way attack drone launches down 83% [10]

The targets have included Iran's nuclear infrastructure — the Natanz enrichment facility, the Isfahan nuclear complex, and a covert weapons development site known as Minzadehei — as well as IRGC command centers, ballistic missile sites, the state broadcasting headquarters, and air defense systems [11]. The IAEA confirmed damage to entrance buildings at the underground Natanz facility, though it reported no radiological release [11].

Source: GDELT Project

Data as of Mar 10, 2026CSV

Iran Strikes Back

Iran's response has been far from passive. According to US Admiral Brad Cooper, Tehran launched more than 500 ballistic missiles and 2,000 drones in the first days of the war [11]. But the retaliation has not been limited to Israel. Iran struck US bases and allied nations across the entire region, targeting at least 27 military facilities where American troops are deployed [10].

The most devastating Iranian counterattack came on March 1, when a projectile penetrated air defenses and struck a fortified US command center at a Kuwaiti port, killing six Army reservists — many of whom had served together years earlier at the same base [3]. A seventh soldier died from injuries sustained in an attack in Saudi Arabia, and about 140 US service members have been wounded since the war began [3][12].

Iran has also targeted civilian and energy infrastructure across the Persian Gulf. The UAE Ministry of Defense reported 165 ballistic missiles, two cruise missiles, and 541 drones fired at its territory [10]. Strikes hit Al Udeid Air Base in Qatar, Ali Al Salem Air Base in Kuwait, Al Dhafra Air Base in the UAE, and the US Navy Fifth Fleet headquarters in Bahrain [10].

The Strait of Hormuz Crisis

Perhaps the war's most consequential economic fallout has been the effective closure of the Strait of Hormuz, the narrow waterway through which one-fifth of the world's oil supply passes daily. An IRGC commander declared the strait "closed" on March 3, warning that any vessel attempting to pass would be set "ablaze" [13].

In practice, it is insurance companies — not Iranian gunboats — that have sealed the strait. With underwriters refusing to cover tankers transiting the war zone, commercial shipping has ground to a near halt [13]. The result has been an oil price shock not seen in years.

Source: FRED / U.S. Energy Information Administration

Data as of Mar 4, 2026CSV

Brent crude surpassed $100 per barrel on March 8 for the first time in four years, peaking at $126 [14]. Iraq and Kuwait have begun shutting in production, and analysts warn that Saudi Arabia and the UAE could follow if the strait remains closed [13]. The impact falls hardest on Asia — China, India, Japan, and South Korea account for nearly 70% of oil shipped through Hormuz [13].

Trump warned on March 10 that there would be military consequences "at a level never seen before" if Iran mines the strait [15]. But the damage to global energy markets is already done: the disruption threatens not just fuel supplies but, as Euronews reported, the world's food supply chains [16].

The War Expands: Lebanon, Hezbollah, and Beyond

The conflict has not remained confined to Iran and the Persian Gulf. On March 2, Hezbollah — the Iran-backed Lebanese militant group — launched strikes on Israel in retaliation for Khamenei's killing [17]. Secretary-General Naim Qassem declared it a "duty of confronting the aggression."

Israel responded with a devastating bombing campaign across Lebanon. By March 8, at least 294 people had been killed and more than 1,000 injured in Lebanon [18]. Israeli strikes extended into central Beirut for the first time when a naval strike hit the Ramada Plaza hotel on March 8, killing at least four people. The IDF said it had targeted five senior IRGC Quds Force commanders operating from the hotel — which was also sheltering civilians displaced by the fighting in southern Lebanon [19].

The humanitarian toll has been staggering. Nearly 700,000 people have fled their homes across the broader region, including over 100,000 inside Lebanon alone [18]. The UN reported that approximately 10,000 Syrian refugees in Lebanon have been pushed back into Syria by the violence [18]. Lebanon's Prime Minister Nawaf Salam condemned Hezbollah's attacks as "irresponsible acts outside the authority of the Lebanese state," and the government declared the group's military activities illegal — but the damage was done [17].

The Civilian Cost

The human toll inside Iran is mounting and contested. The Kurdish human rights organization Hengaw reported at least 4,300 people killed in the first ten days of the war, including 390 confirmed civilians [20]. Other organizations have provided higher civilian figures: by March 3, the Iranian Red Crescent reported over 600 civilian deaths, while the Human Rights Activists in Iran estimated 742 [2]. UNICEF said at least 181 children were among the dead [2].

The strikes have damaged schools, hospitals, the Grand Bazaar in Tehran, and the Golestan Palace — a UNESCO World Heritage Site [2]. The historical Falak-ol-Aflak castle was also reportedly damaged [2]. Particularly devastating was a strike on the Shajareh Tayyebeh primary school in Hormozgan province, which killed an undisclosed number of elementary school girls [20].

The ACLED conflict data organization documented a troubling pattern: while fewer than 4% of US-Israeli strikes targeted civilian sites, those strikes accounted for over 57% of all civilian casualties — suggesting the use of large munitions in populated areas [20].

Source: Hengaw / UNICEF / CNN / UN News

Data as of Mar 10, 2026CSV

A Divided World Responds

The international community has fractured along predictable lines. China and Russia convened an emergency UN Security Council session, with Moscow calling the operation "a deliberate, premeditated, and unprovoked act of armed aggression against a sovereign and independent UN member state" [21]. UN Secretary-General António Guterres warned the strikes risked "igniting a chain of events that nobody can control in the most volatile region of the world" [21].

But the Council took no formal action — an inevitable outcome given the US veto [21]. European allies offered careful rhetoric. UK Prime Minister Keir Starmer condemned Iran's counter-strikes but said he did "not believe in regime change from the skies" [22]. Pakistan condemned the US-Israeli strikes as violations of international law while simultaneously criticizing Iran's attacks on Gulf states [21]. The Gulf Cooperation Council held Iran "fully responsible" for the escalation in the Gulf [21].

The US and Israel defended their operations as lawful acts of self-defense at a heated Security Council session, arguing that diplomacy had been exhausted and a nuclear-armed Iran posed an unacceptable threat [23].

What Comes Next

On Day 10, as Hegseth promised his "most intense" strikes yet, the contours of the conflict's endgame remained murky. Trump predicted the war could last "four weeks" and described it as "very complete, pretty much" [8]. But the IRGC issued a defiant response: "Iran will determine when the war ends" [24].

The military math may favor the United States — Iranian missile launches are down 90%, its navy is crippled, and its nuclear facilities are damaged [1][9]. But the strategic picture is far more complex. Oil prices remain at crisis levels with no resolution to the Hormuz blockade. Hezbollah has opened a second front in Lebanon. Hundreds of thousands of civilians are displaced. American troops continue to take casualties across the Gulf. And Iran, now led by a new supreme leader with everything to prove, shows no sign of capitulating.

The Pentagon has named this Operation Epic Fury. Iran has its own name: "Operation Epic Mistake" [24]. History will judge which characterization proves more accurate — but for the millions of people caught between the warring powers, the consequences are already catastrophic and growing by the day.