It “cuts my heart” and is a “betrayal”.

This was the response of a Ukrainian soldier in a frontline combat regiment directly affected by Donald Trump’s decision to pause US military support to Ukraine.

Serhii, 45, maintains a unit of US-supplied Bradley infantry fighting vehicles that are defending an area of eastern Ukraine from attacking Russian forces.

The halt to American military aid – if sustained – means there will be no new ammunition and no ability to repair any of the vehicles when they are damaged – a constant risk.

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On a recent mission by the 425th Storming Regiment “Skala”, three Bradleys went into battle towards the direction of the city of Pokrovsk, an area of heavy clashes.

Only two returned after the other was hit by the Russian side.

“It’s going to be very hard,” Serhii said, standing next to a large Bradley, covered by a camouflage net and tucked under a line of trees in the Donetsk region.

“These vehicles are really good. You can fight back with them. And not just defend, you can even advance. It’s a shame we didn’t have this equipment two or three years ago.”

The regiment has been using Bradleys for a number of months. Serhii is the lead mechanic.

The tracked vehicles, armed with a chain gun that can fire 200 rounds per minute, were first developed in the 1980s but have been fitted with modern reactive armour that means they can survive drone strikes, rocket attacks and the shrapnel from artillery rounds.

“The vehicle’s protection… is fantastic,” Serhii said, with clear admiration for the equipment compared with Soviet-era fighting vehicles that many Ukrainian troops have to use.

He said the crew of one of his Bradleys was hit by two rocket-propelled grenades but was able to continue driving and was unharmed.

Serhii, who comes from the Donetsk region, said he felt betrayed by Mr Trump’s decision to halt such crucial support.

The US president ordered the move as he attempts to put pressure on Ukrainian President Volodymyr Zelenskyy to negotiate a ceasefire deal with Russia.

“Although I’m not a politician, it’s a betrayal for us, for the guys who are defending Ukraine,” the soldier said.

Asked how he felt when he heard the news about the US president’s decision, Serhii said: “The latest news cuts my heart, I can answer you that way. It cuts my heart… If politicians solve issues this way, just by halting weapons supply in one move, that’s criminal.”

He signalled it would be harder for Ukrainian troops to defend their land without the US military support – but they would still fight.

“Even without this weapon, we believe we will move forward,” he said.

“They [the Russians] have to retreat, no matter what. The guys didn’t take up arms here for nothing, and they stand together. Together, all of us, as one, will defeat this enemy.”

As for whether he had a message for Mr Trump, the soldier said: “Don’t stop military aid. Politics is politics, but the people, I believe, are the most important.

“It will be very hard for us without such equipment. This equipment is good; it allows us to show results. And we will keep showing them. We’ve shown them before and we will keep showing them. That’s how it is. Thank you.”

Fighting ‘for my motherland’

Sky News watched as two crews prepared their fighting vehicles for a potential mission on Thursday evening.

Sedoi, 41, commands one of the Bradleys and operates the gun.

He said the American-supplied vehicle gives him confidence when he goes into battle – and was also likely a scary prospect for Russian troops to have to encounter.

“We make a lot of noise. Everything catches fire and burns… It’s a good vehicle,” he said.

Sedoi said he did not have a reaction to the news about the halt to American military support, saying: “I don’t get involved in their politics.”

However, he signalled he did want an end to the war – even if it meant Russia keeping some of the land it has seized.

“Let it end, so people stop dying. Because a lot of people have died,” he said.

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Recently recovered from a shrapnel wound, Sedoi said he volunteered to fight after Vladimir Putin launched his full-scale war more than three years ago because of Russia’s brutality.

“I’ve heard what they do when they enter villages, what they do with children and women… I don’t want them to go any further… That’s why I’m here.

“But, to be honest, I’m getting tired of it.”

Yet still he and his fellow soldiers battle on. Asked why he was fighting, the soldier said: “For my motherland.”