Can Iran’s asymmetric warfare hold US-Israeli military power at bay? 

Despite United States President Donald Trump’s repeated declarations of victory in the US-Israeli war on Iran, Tehran’s retaliatory strikes on Israel and US military assets in the region have continued, upending global financial and energy markets.

“We’ve had two decades to study defeats of the US military to our immediate east and west. We’ve incorporated lessons accordingly,” Iranian Foreign Minister Seyed Abbas Araghchi wrote in a post on X on March 1, the day after US and Israeli strikes on Tehran killed Iran’s Supreme Leader Ayatollah Ali Khamenei and other senior Iranian officials.

“Bombings in our capital have no impact on our ability to conduct war,” he wrote.

According to analysts, Iran has made use of “asymmetric” warfare tactics while striking the US and Israel. So, are Tehran’s war tactics working?

Here’s what we know:

What is ‘asymmetric’ warfare?

When the balance of capabilities is unequal in a conflict – as it is in relation to weapons in this one – the weaker party can turn to unconventional methods of warfare, John Phillips, a British safety, security and risk adviser and a former military chief instructor, told Al Jazeera.

This is known as “asymmetric” warfare.

This can include the use of guerrilla tactics, terrorism, cyberattacks, use of proxies and other indirect tools, Phillips said, in order “to offset conventional inferiority, avoid the enemy’s strengths, and exploit vulnerabilities in political will, logistics, and legal or ethical constraints”.

“Iran is conventionally weaker than the US and Israel, but relatively strong compared to many neighbours,” he said.

“What makes Iran distinctive is not that it uses these methods at all, but that they sit at the centre of its grand strategy rather than at its margins.”

Why is Iran using asymmetric warfare?

In the ongoing war between Iran and the US-Israel, Washington and Tel Aviv have been using expensive missiles and drones to attack Iran and to intercept missiles Iran has fired back. The Patriot and THAAD defence systems, for example, which launch interceptors to take out incoming drones and missiles, can cost millions of dollars for each missile they fire. This compares with the $20,000-$35,000 cost of each Iranian Shahed drone.

As a result, the US has reportedly spent $2bn a day in its war on Iran and there are fears it could run out of interceptor missiles altogether if the war goes on for more than a few weeks.

It is therefore in Iran’s interests to focus on holding out against strikes and protecting its own weapons supplies while it does so, military experts say.

However, Phillips explained that precision strikes and sabotage by Israel and the US have demonstrated that Iran is not able to fully shield its missile, drone and nuclear‑related assets, while sanctions and domestic pressures have limited its capacity to sustain a very high‑tempo confrontation.

“As a result, Iran’s asymmetric approach is best understood as an effective ‘survival and leverage’ mechanism that produces a chronic, costly ‘shadow war’, rather than a path to decisive regional hegemony or victory,” he said.

Iran began using asymmetric warfare techniques following the 1979 Iranian revolution, which overthrew Shah Mohammad Reza Pahlavi.

“Instead of trying to match high‑end aircraft, precision munitions, or blue‑water fleets, [Iran] has built a ‘forward deterrence’ posture that operates in the grey zone between war and peace,” Phillips said.

“This is backed by large inventories of ballistic and cruise missiles, mass‑produced drones [often handed to proxies], cyber-operations, and a posture of underground, dispersed and hardened facilities that make preemption difficult and preserve some retaliatory capability.”

What asymmetric tactics has Iran been using?

Enemy depletion tactics

Since US-Israeli strikes on Iran began on February 28, Tehran has launched a wave of ballistic missiles targeting Israel and US military bases across the Gulf region.

Using a mix of short and medium-range ballistic missiles, as well as drone swarms through this defence system, Iran aims to deplete Israeli and US interceptor stockpiles.

Economic warfare

Iran has shut down the Strait of Hormuz through which about 20 percent of global oil and gas supplies are shipped. Linking the Gulf to the Gulf of Oman, the strait is the only waterway to the open ocean available to Gulf oil producers.

On Thursday, Iran attacked fuel tankers in Iraqi waters. Instability in and around the Strait of Hormuz drove Brent crude oil prices past $100 a barrel last week, with wild swings ongoing, prompting fears of a global energy crisis.

Iran has also targeted civilian infrastructure like airports and desalination plants which are crucial for water supply in the region, and it has launched drones targeting oil depots.

War on global finance

Meanwhile, on Wednesday this week, Iran’s Islamic Revolutionary Guard Corps (IRGC) threatened to attack “economic centres and banks” with links to United States and Israeli entities in the Gulf region after what it claimed was an attack on an Iranian bank, with the war in its 12th day.

Since then, many banks like Citibank and HSBC in Qatar, have begun shutting, further threatening global financial stability.

Top technology companies such as Google, Microsoft, Palantir, IBM, Nvidia and Oracle, as well as the listed offices and infrastructure for cloud-based services, are also located in several Israeli cities and in some Gulf countries, which Iran has also threatened to attack.

Use of proxies

Iran has aimed to keep the much more powerful US military and its allies off balance through proxies in Iraq, Lebanon and Yemen. Hezbollah in Lebanon, for example, has fired missiles and drones into northern Israel since March 2 as part of Iran’s retaliatory strikes.

“At the core of this [asymmetric] approach is a network of proxies and partners – Hezbollah in Lebanon, Shia militias in Iraq, groups in Syria, Hamas and Palestinian Islamic Jihad in Gaza and the Houthis in Yemen – which receive weapons, training, funding and ideological guidance from Iran,” Phillips said.

These actors allow Tehran to threaten Israeli and US forces, as well as regional shipping lanes, on multiple fronts, “often with a degree of deniability and at a fraction of the cost of deploying its own regular forces”, Phillips noted.

‘Mosaic’ defence system

Iran has organised its defensive structure into multiple regional and semi-independent layers instead of concentrating power in a single command chain that could be paralysed by a decapitation strike. This concept is most closely associated with the formation of the parallel military force, the Islamic Revolutionary Guard Corps (IRGC), particularly under former commander Mohammad Ali Jafari, who led the force from 2007 to 2019.

The doctrine has two central aims: to make Iran’s command system difficult to dismantle by force, and to make the battlefield itself harder to resolve quickly by turning Iran into a layered arena of regular defence, irregular warfare, local mobilisation and long-term attrition.

What damage have these tactics done to the US and Israel?

Iran’s asymmetrical playbook has made the war more expensive for the US. It has been forced to spend money on replacing stockpiles of expensive missiles like Tomahawks and defensive systems such as Patriot and THAAD interceptors.

According to the Center for Strategic and International Studies (CSIS), the first 100 hours alone of Operation Epic Fury – the codename for the US-Israeli assault on Iran – cost the US approximately $3.7bn, mostly unbudgeted. Israel, already reeling from the economic strain of its prolonged wars in Gaza and Lebanon, faces mounting domestic pressure as daily sirens force millions into bunkers.

While the Pentagon has not yet announced an official estimate for the cost of the war, late last week, two congressional sources told US broadcaster MS NOW that the war is costing the United States an estimated $1bn a day.

A day later, Politico reported that US Republicans on Capitol Hill privately fear the Pentagon is spending close to $2bn a day on the war.

Meanwhile, officials from President Donald Trump’s administration estimated during a congressional briefing this week that the first six days of the war on Iran had cost the US at least $11.3bn, a source familiar with the matter told the Reuters news agency.

Reporting from Washington, DC, following the publication of the CSIS analysis last week, Al Jazeera’s Rosiland Jordan said the Pentagon had put together a $50bn supplemental budget request in order to replace Tomahawk and Patriot missiles and THAAD interceptors already used in the first week of the war, along with other equipment that had been damaged or worn out so far.

Are Iran’s tactics working?

To a certain extent, they are.

According to a report by The Soufan Center, the “pattern of Iranian counterattacks suggests a layered operational approach designed to generate pressure on Gulf states, create regional disruption on land, sea, and air, while simultaneously attempting to exhaust US and allied defensive resources”.

“Tehran appears to be fighting a war of endurance: prolong the conflict, expand the economic battlefield, make the costs increasingly prohibitive, ration advanced capabilities, and impose steady human and financial costs on its adversaries. All with the hope that political tolerance erodes faster in Jerusalem and Washington than in Tehran,” the report noted.

This may be working. Questions about the cost of the war are already causing a political headache for the Trump administration in Washington.

Congress’s House Minority Leader Hakeem Jeffries told reporters at a Capitol Hill news conference last week that President Donald Trump is “plunging America into another endless conflict in the Middle East” and “spending billions of dollars to bomb Iran”.

“But they can’t find a dime to make it more affordable for the American people to go see a doctor when they need one,” he said. “Can’t find a dime to make it easier for Americans who are working hard to purchase their first home. And they can’t find a dime to lower the grocery bills of the American people.”

Trump won the presidency in 2024 largely on the back of a promise to handle the rising cost of living and he faces mid-term elections this year. It is likely that the cost of the war will not play well with voters, analysts say.

In Israel, opposition politician Yair Golan has also criticised his government’s economic management of the war.

In a post on X on Sunday, he wrote: “The war with Iran has been planned for months. The fact that the Israeli government has not prepared an orderly economic plan to support citizens during the war period is a disgrace.

“The serving and working public should not be the one footing the bill for the war out of its own pocket while billions of shekels go to the evading and non-working sector,” he said, adding that the opposition will soon replace the government.

Ali Vaez, director of the Iran Project at the International Crisis Group, told Al Jazeera that at a fraction of the cost – and despite a significant technological gap – Iran has demonstrated an ability to hold the global economy at risk, to pressure Washington into “blinking first”.

“A steady stream of inexpensive drones and limited missile strikes can disrupt the thriving economies of Israel and the Gulf, sending shockwaves through energy markets and ultimately translating into higher prices at American gas stations,” he said.

Phillips, the British safety, security and risk adviser, said the strategy has worked in important but limited ways.

“It has helped the Islamic republic survive intense sanctions, clandestine campaigns and periodic strikes while maintaining a credible ability to hit US bases, Israeli territory and Gulf infrastructure, which in turn raises the political and military cost of any attempt at regime-change war,” he said.

“Iran’s reach – stretching from Lebanon and Syria to Iraq and Yemen – allows it to shape crises, quickly raise the stakes of local conflicts, and force adversaries to devote substantial resources to missile defence, counter‑UAV systems, naval protection and regional coalition management,” he noted.

“However, there are clear constraints and growing problems. Key proxies such as Hezbollah and various militias have suffered leadership and infrastructure losses; the network has become more fragmented and sometimes less controllable, increasing the risk of unwanted escalation even as its coherence as an instrument of policy erodes,” he added.