In the aftermath of the Israeli-U.S. strikes on Iran, American allies in the Persian Gulf are hearing a sound that Ukrainian soldiers have long come to dread: the foreboding hum of the Shahed-136 ‘kamikaze’ drone. 

Originating from Iran, the Shahed has already become a fixture of modern warfare, with Tehran’s strategic partner, Russia, utilizing the technology in its years-long invasion of Ukraine. 

Now, the drones — the most advanced of which is the long-ranged Shahed-136 — have become central to Iran’s retaliation strategy against the U.S. and its regional allies, with thousands unleashed so far. 

At first glance, the Shahed is unremarkable compared with cutting-edge weapon technologies, with one analyst referring to it as “the poor man’s cruise missile.” 

But while American allies have managed to intercept the vast majority of incoming drones with the help of U.S.-provided defense systems such as the ‘Patriot’ missiles, many Shaheds still managed to hit their targets. 

The United Arab Emirates Ministry of Defence said on Tuesday that out of 941 Iranian drones detected since the start of the Iran war, 65 fell within its territory, damaging ports, airports, hotels and data centers.

Analysts say the key to their effectiveness lies in the numbers. The drones are relatively cheap and easy to mass-produce, especially compared to the sophisticated systems used to defend against them. 

Those factors make the drone ideal for swarming and overburdening aerial defenses, with each drone intercepted also representing a more valuable defense asset expended. 

“The Shahed‑136, among other unmanned aerial systems, has allowed states like Russia and Iran a cheap way to impose disproportionate costs,” said Patrycja Bazylczyk, analyst with the Missile Defense Project at the Center for Strategic and International Studies in Washington DC.

“They force adversaries to waste expensive interceptors on low‑cost drones, project power, and create a steady psychological burden on civilian populations.” 

U.S. government reports describe the Shahed-136 as a one-way attack unmanned aerial vehicle produced by Iranian entities tied to the Islamic Revolutionary Guard Corps.

Compared with ballistic missiles, the drones fly low and slow, deliver a relatively modest payload, and are limited to mostly fixed targets, said Behnam Ben Taleblu, senior director of the Iran program at the Foundation for Defense of Democracies, told CNBC.

Public estimates suggest Shahed drones can cost between $20,000 and $50,000 apiece. Ballistic and cruise missiles, by contrast, can cost millions of dollars each.

In that sense, the Shahed and its equivalents “basically serve as ‘the poor man’s cruise missile’ offering a way to strike and harass adversaries “on the cheap,” said Taleblu.

For Iran, which faces both international sanctions and limitations on acquiring advanced weapons, that cost advantage is significant.

Meanwhile, air defense systems used by Gulf states and Israel can cost between $3 million and $12 million per interceptor, according to U.S. Department of Defense budget documents.

This cost discrepancy raises a serious issue for Iran’s enemies: Air defense systems have finite numbers of defense missiles, with each target intercepted representing a valuable asset expended.

Thus, in a war of attrition, the drones could be used by Tehran to wear down air defenses, opening them up to more damaging attacks, analysts say.

“The logic is to expend drones early while preserving ballistic missiles for the long haul,” said CSIS’s Bazylczyk.

She added that Iran’s ability to sustain mass‑drone use will depend on its stockpiles, how well it can protect or restore its supply chain, and whether the U.S. and Israel can meaningfully disrupt the flow of components or production sites. 

The U.S. has long sought to disrupt Iran’s production of the Shahed-136, and recently imposed new sanctions targeting suspected component suppliers across Turkey and the UAE.

However, Russia’s production of Shahed drones shows that such systems can be manufactured at scale during wartime and amid targeted sanctions. 

U.S. officials claim Iran had launched over 2,000 drones in the conflict as of Wednesday. However, the country is understood to have large stockpiles and may be capable of producing hundreds more each week, military experts reportedly told The National newspaper.

“Gulf countries are at risk of depleting their interceptors unless they are more prudent about when it fires those interceptors,” said Joze Pelayo, a Middle East security analyst with the think tank Atlantic Council.

“The depletion is not imminent, but it remains an urgent issue,” he said, noting. However, attacks on multiple fronts by Iranian allies such as Hezbollah and the Houthis could put stockpiles at risk of being depleted within days, he added.

Some analysts have suggested that Iran has drawn from Russia’s extensive battlefield experience with the drones, including modifications such as anti-jamming antennas, electronic warfare-resistant navigation, and new warheads.

Those warheads typically carry 30 kg to 50 kg of explosives and can pack a punch, particularly when used in large swarms, with advanced versions capable of a range of up to 1,200 miles.

Michael Connell, a Middle East specialist at the Center for Naval Analyses, said that the Shahed-136 has proven so effective that the U.S. has reverse-engineered it and deployed its own version on the battlefield against Iranian targets. 

In its Iran attacks over the weekend, the U.S. Central Command confirmed that it had used such low-cost one-way attack drones modeled after the Shahed for the first time in combat. 

With drones becoming a fixture of the modern battlefield, methods for dealing with them are also evolving.

According to Taleblu from the Foundation for Defense of Democracies, Ukraine has found some success in downing drones with fighter jet cannon fire, a more sustainable deterrent than missile interceptors.

Ukraine also recently pioneered the development of cheaper mass-produced interceptors, which Kyiv claims can stop the Shahed.

Gulf states are also expected to adopt more sustainable approaches. The Pentagon and at least one Gulf government are reportedly in talks to buy the cheaper Ukrainian-made interceptors.

Meanwhile, Qatar’s Ministry of Defense says it is also using its air force jets to intercept Iranian attacks, including Shahed drones, alongside ground-based air defenses.

Electronic warfare targeting the Shahed’s GPS, as well as short-range missiles and directed-energy systems such as Israel’s Iron Beam, are also significantly cheaper to operate than traditional interceptors.

Still, analysts say Gulf states currently lack fast, high-volume anti-drone capabilities. Developing and deploying such systems will likely take years, said Atlantic Council’s Pelayo.

“Countries in the Gulf hosting U.S. bases, such as Bahrain, Kuwait, and the UAE, benefit from an extended ability to repel drone attacks through the American-operated system, but it is still not enough against mass and sustained attacks.”

“To be free, one must be feared. To be feared, one must be powerful,” French President Emmanuel Macron said during a landmark speech this week on nuclear deterrence.

France is one of only two nuclear powers in Europe and, unlike the U.K., operates a nuclear weapons system entirely independent of the U.S.

As the U.S. and Israel continued to strike Iran, and European leaders appeared divided and sidelined as they scrambled to react, Macron delivered a speech on Monday that was “the most significant update to French nuclear deterrence policy in 30 years,” Bruno Tertrais, deputy director of the Foundation for Strategic Research, said in a thread on X.

Speaking from a naval base in Brittany in front of a submarine, “Le Téméraire,” Macron’s 45-minute speech laid out what he called a new “forward deterrence” doctrine for France.

Macron said France would increase its number of nuclear warheads and promised more cooperation with European allies that have expressed interest.

He said several European countries — Germany, Poland, the Netherlands, Belgium, Greece, Sweden and Denmark — could take part in exercises of France’s air-launched nuclear capacity and France’s nuclear bombers could be stationed at their air bases. Macron also said France would stop disclosing the figures for its nuclear arsenal.

“The world is becoming more difficult, and recent events have demonstrated this once again,” he said in the speech.

“We must strengthen our nuclear deterrent in the face of the combination of threats, and we must consider our deterrence strategy within the depths of the European continent, with full respect for our sovereignty, through the progressive implementation of what I would call forward deterrence.”

Yannick Pincé, associate professor of history at the Université Sorbonne Nouvelle, told CNBC that the speech had to be seen in the context of next year’s presidential election, which a far-right National Rally candidate could win.

“He needed to give a politically acceptable speech, to announce measures that would be difficult to reverse next year,” Pincé said.

“At the same time, he needed to be credible enough with our allies. He was walking a tightrope, and from my point of view, he succeeded rather well.”

An independent nuclear deterrent has been the cornerstone of France’s defense strategy for more than 60 years.

But Macron said that the doctrine has to evolve with the threats. In 2020, Macron hinted at a shift when he said that France’s “vital interests” – a definition of which remains deliberately vague – now had “a European dimension.”

On Monday, Macron said that the years since 2020 “weigh like decades, and the last few months like years.”

“Our competitors have evolved, as have our partners,” he said, adding “the last few hours” of escalating conflict in the Middle East showed how the world has become “harsher.”

Macron mentioned the war in Ukraine and the threat from Russia, but also China and changing defense priorities of the United States.

In line with the historic nuclear doctrine, Macron said that the decision to use force “belongs solely to the President of the Republic,” rejecting explicit “guarantees” to partner countries.

Ankit Panda, Stanton senior fellow in the nuclear policy program at the Carnegie Endowment for International Peace, called the speech “remarkable.”

Global defense stocks jumped on Monday as investors reacted to a dramatic military escalation in the Middle East over the weekend.

The sector was a rare bright spot amid a broader market sell-off triggered by fears of a wider regional conflict.

Germany’s Hensoldt and Britain’s BAE Systems were among the top performers in the Stoxx 600, both up around 4%. Defense names Thales, Renk, and Leonardo rose between 4% and 1%, paring earlier gains, while the broader Stoxx 600 index fell more than 1%, touching a two-week low.

Stateside, U.S. firms Lockheed Martin and Northrop Grumman each rose more than 5% in premarket trading. Futures tracking the S&P 500 were down 1.1%.

With South Korean markets closed Monday, regional activity in Asia-Pacific defense sector was somewhat muted. Japan’s defense heavyweights Mitsubishi Heavy Industries and IHI rose about 3% each, while Singapore’s ST Engineering climbed 2.8%.

The moves come after the U.S. and Israel launched widespread attacks on Iran over the weekend that killed Iranian Supreme Leader Ayatollah Ali Khamenei, ending his 36-year rule. Retaliatory strikes by Iran against U.S. bases in the Middle East killed three U.S. service members.

Prospects of an escalation also led oil prices and energy companies’ shares to surge.

“It’s very much one of uncertainty at the moment that investors are grappling with,” said Patrick O’Donnell, Chief Investment Strategist at Omnis Investments.

“Equity markets are a little bit more uncertain about just how long this is going to drag on, for the implication for both growth and inflation that it will have the longer that it goes on,” O’Donnell told CNBC’s “Squawk Box Europe” on Monday.

“Really, it’s a question of… what’s the duration of this conflict?”

The conflict with Iran entered a third day on Monday, with U.S. President Donald Trump warning of further American casualties and saying the conflict could last for up to four weeks. 

In June last year, the U.S. and Israel launched air strikes that damaged three Iranian nuclear sites.

Carl Bildt, former Prime Minister of Sweden and co-chair of ECFR’s Council, said it was expected that Iran would strike back at the American military facilities in the Gulf region, “but now it seems like they are striking other targets across the Gulf as well.”

“That is surprising, but also highly disturbing, because, of course, the stability of the Gulf countries is important to us all, important to the global economy, important to the region,” he said.