Secretary of War Pete Hegseth warned that more casualties are expected in the ongoing Operation Epic Fury in Iran, with seven U.S. soldiers having been killed so far in the fighting.

Hegseth made the comment during an interview with CBS’ “60 Minutes” that aired on Sunday.

“The president’s been right to say there will be casualties,” Hegseth said. “Things like this don’t happen without casualties.”

“There will be more casualties,” he continued. “And no one is — I mean, especially our generation knows what it’s like to see Americans come home in caskets, it’s — but that doesn’t weaken us one bit. It stiffens our spine and our resolve to say this is a fight we will finish.”

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Six U.S. service members were killed in a March 1 Iranian drone attack in Port Shuaiba, Kuwait, while supporting Operation Epic Fury. The U.S. military said a seventh service member died of injuries from an Iranian attack on troops in Saudi Arabia on March 1.

The U.S. and Israel last week launched joint strikes against Iran. Iran has retaliated, launching strikes against Israel and neighboring Gulf Arab states, including Qatar and Saudi Arabia.

Iranian Foreign Minister Abbas Aragchi on Sunday told NBC News’ “Meet the Press” that if the U.S. deploys ground troops in Iran, “we have very brave soldiers who are waiting for any enemy who enters into our soil, to fight with them and to kill them and destroy them.”

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“We never give up, we never surrender, and we continue to resist as long as it takes,” he said. “We continue to defend ourselves, and we are defending our territory, our people and our dignity. And our dignity is not for sale.”

When reporters asked President Donald Trump aboard Air Force One on Saturday about potential ground troops being used in the Iran operation, the president said there would “have to be a very good reason.”

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“And I would say if we ever did that, [Iran] would be so decimated they wouldn’t be able to fight at the ground level,” Trump told reporters.

The Associated Press contributed to this report.

Ukrainian President Volodymyr Zelenskyy has said that Kyiv could provide defensive systems as well as assistance to civilians and American soldiers “deployed in certain countries” in the Middle East as the war in Iran continues.

He has reportedly proposed an exchange of Ukrainian defensive technology to combat Iranian drones in return for advanced US defensive systems to use in the war against Russia.

The US-Israel-Iran conflict, which started 10 days ago when the United States and Israel launched strikes on Iran and killed Iran’s supreme leader, Ayatollah Ali Khamenei, has continued to escalate. Iran has responded with strikes on Israel and US military assets and other infrastructure in Kuwait, Bahrain, Qatar, Saudi Arabia and the United Arab Emirates.

As Gulf and other Middle Eastern states continue to attempt to intercept incoming drones and missiles with US-supplied air defences, the US has asked Ukraine to contribute some of its own air-defence systems.

Here is what we know.

What has the US requested from Ukraine and why?

The US has asked for Ukraine’s help in defending Washington’s allies in the Middle East against Iranian missile attacks on infrastructure and US military assets, Ukraine’s president confirmed last week.

At the moment, the US is using air defence systems such as the Patriot, Terminal High Altitude Area Defense (THAAD) batteries and Airborne Warning and Control System (AWACS) aircraft, to intercept Iranian drones and missiles targeting its military assets in the region. The Patriot Advanced Capability-2 (PAC-2) and PAC-3 are advanced surface-to-air missile defence systems.

However, these types of systems are extremely expensive, costing millions of dollars for each interceptor missile fired, and there are concerns that supplies of US interceptor missiles could run low.

“We received a request from the United States for specific support in protection against ‘shaheds’ in the Middle East region,” Zelenskyy wrote in an X post on March 5.

Shahed drones, particularly the Shahed-136, are Iranian-designed “kamikaze” or loitering munitions which are very low cost compared to the interceptors being used by the US. Costing roughly $20,000-$35,000 each, these GPS-guided drones are about 3.5m (11.5 feet) long and fly autonomously to pre-programmed coordinates to strike fixed targets with explosive payloads. They blow up as they hit their targets.

Over the course of the Iran war, Shahed-136 drones have targeted Middle Eastern countries including Saudi Arabia, Bahrain, Qatar and the UAE where US military assets and troops are hosted. Experts estimate that Iran has thousands of these drones.

Iran has also been supplying Moscow with many thousands of Shahed drones during Russia’s war on Ukraine.

During the course of Russia’s four-year war on Ukraine, Ukraine’s domestic arms industry has been forced to innovate, building low-cost interceptor drones priced at roughly $1,000 to $2,000 to counter Russian attacks with imported Iranian Shahed-136s.

Kyiv is now mass-producing these low-cost interceptor drones.

“The role of Shahed-type drones in long-range attacks has become more prominent in Ukraine after Russia took Iranian technology, improved it, and built it in previously unimaginable numbers,” Keir Giles, a Eurasia expert for the UK-based think tank Chatham House, told Al Jazeera.

What has Zelenskyy said?

Zelenskyy has posted several statements on social media confirming that he is ready to help Middle Eastern countries defend their territories by providing technical expertise.

“Ukrainians have been fighting against ‘shahed’ drones for years now, and everyone recognises that no other country in the world has this kind of experience. We are ready to help,” he wrote on X on March 5.

“I gave instructions to provide the necessary means and ensure the presence of Ukrainian specialists who can guarantee the required security.

“Ukraine helps partners who help ensure our security and protect the lives of our people.”

It is understood that Ukraine is in talks with several Middle Eastern countries about this.

On Monday, Zelenskyy said Ukraine has deployed interceptor drones and a team of specialists to help protect US military bases in Jordan.

Zelenskyy wrote on X that he has also spoken directly to Saudi Crown Prince Mohammed bin Salman (MBS) about “countering threats from the Iranian regime”.

He also said he had spoken with the leaders of Bahrain, Jordan, Kuwait, Qatar and the UAE.

Zelenskyy has repeatedly stressed that Ukraine must not weaken its own air defences. However, it is mass-producing this equipment now, and may well be able to afford to share.

“The fact that there are surplus capabilities ready to be sent to the US and the Middle East is unsurprising because Ukraine has led this innovation,” Giles said.

Zelenskyy has therefore proposed an exchange of air defence systems with the US ones being used in the Middle East.

“We ourselves are at war. And I said, completely frankly, that we have a shortage of what they have. They have missiles for the Patriots, but hundreds or thousands of ‘shaheds’ cannot be intercepted with Patriot missiles – it is too costly,” Zelenskyy said.

“Meanwhile, we have a shortage of PAC-2 and PAC-3 missiles. So, when it comes to technology or weapons exchange, I believe our country will be open to it.”

Zelenskyy may also have good political reasons for extending help, analysts say.

“The US has declined support for Ukraine on the ground that it had insufficient supply of air defence munitions, and now more of those Patriots have been fired in the Middle East in a few days, than have been supplied to Ukraine in four years,” Giles said.

“Zelenskyy will be aware that in providing this assistance, he is not only shaming the US, but also directly supporting potential friends and partners in the Middle East, who before now have been ambivalent to the situation in Ukraine,” Giles said.

Who else has sent defensive backup to the Gulf?

European countries including the United Kingdom, France, Spain, Portugal, Greece and Italy have pledged to provide defensive backup to Gulf nations over the past week. Additionally, Australia said it was deploying military assets to the region.

Wary of becoming directly involved in the US-Israeli war on Iran, European countries have nevertheless been drawn into the conflict by attacks on a British base on Cyprus in the Mediterranean and Iranian strikes on Western allies in Gulf countries that host US troops in military bases.

What will happen next?

Just as Ukraine is getting involved in the war, Russia might too, say experts.

“We should not be surprised if before long, as well as Russian technology in Iranian drones, we see Iran launching Shaheds manufactured in Russia,” Giles said.

He described Russia as a “primary beneficiary of current US actions,” pointing to how the surge in oil prices, the relaxation in US curbs on Russian energy exports to keep crude and gas prices under control, and the diversion of air defence munitions from Europe to the Middle East all helped Moscow. These, he said, “are all lifelines for Russia”.