This is how the front line moves—through attrition and collapse
In the eastern Ukrainian city of Kostyantynivka, a slow and grinding contest is underway that carries consequences far beyond its streets. Russian forces have infiltrated from multiple directions, turning what was once a Ukrainian stronghold into a contested grey zone where control is measured in meters and hours rather than lines on a map. The city stands as the last meaningful barrier before Kramatorsk and Sloviansk — and with it, Russia's long-held ambition to claim the whole of the Donbas. What unfolds here is not merely a tactical battle, but a test of whether exhausted defenders can hold a threshold that, once crossed, may not be recoverable.
- Russian soldiers have entered Kostyantynivka from the south and north simultaneously, turning the city into a fragmented grey zone where neither side holds clear dominance.
- Ukrainian drone operators — the eyes and strike force of the defense — are being systematically hunted and suppressed, leaving Russian troops free to move, observe, and advance.
- Supply routes into the city are under constant attack, and soldiers on the ground say they lack the reinforcements needed even to hold current positions, let alone mount counterattacks.
- Commanders are reluctant to report lost ground because doing so triggers retake orders they cannot fulfill — a silence that masks how far the situation has deteriorated.
- Ukrainian frontline analysts now assess the fall of Kostyantynivka as a matter of time, warning that its loss would make holding Kramatorsk extremely dangerous and bring Russia's Donbas objective within reach.
- Soldiers and drone pilots speaking to journalists are issuing direct warnings: without a fundamental change in strategy — targeting Russian logistics and pilots — the advance will not stop here.
Kostyantynivka is no longer a city anyone fully controls. Russian soldiers have slipped in from multiple directions, and what remains is a contested urban space where the front line moves not through sweeping maneuvers but through daily, metered attrition. Ukrainian commanders insist the situation is manageable; the soldiers fighting there say otherwise.
The city's strategic weight is immense. Should it fall, the road opens toward Kramatorsk and Sloviansk — the last significant Ukrainian-held cities in the Donbas — and with them, Russia's core war objective of seizing the entire region. Kyiv has scored meaningful blows elsewhere, striking Russian oil refineries and disrupting supply lines to Crimea so severely that fuel sales there were suspended. But inside Kostyantynivka, the momentum has shifted the other way.
Brigadier General Oleksandr Bakulin publicly denies that Ukrainian units have been encircled, yet acknowledges roughly 130 Russian soldiers are operating inside the city. A Ukrainian officer speaking candidly to the BBC described the reality as far more serious than officials will admit: Russian forces are accumulating, and the advantage is slowly slipping.
The urban terrain works in Russia's favor. Buildings and summer foliage provide cover through the drone kill zone, while Russian pilots have made Ukrainian drone operators a priority target — suppressing them with artillery and aviation. One Ukrainian drone pilot described the consequence plainly: because his crews spend little time hunting enemy operators, Russian drones move freely, locate Ukrainian positions, and force retreats. This is how ground is lost.
Supply lines have become a crisis of their own. Land routes are constantly struck; reinforcements are not arriving in sufficient numbers. Soldiers report that commanders avoid declaring lost positions because doing so triggers retake orders that simply cannot be carried out. As one soldier put it: there are not enough people to hold what remains, let alone assault anything.
The Ukrainian frontline monitoring project DeepState has assessed the city's fall as a question of when, not if — and warns that once it falls, holding Kramatorsk becomes extremely dangerous. The drone pilot's warning was direct: this is already a major crisis, and without a systematic shift in approach, the Russians will keep advancing. For now, Ukrainian forces are still fighting. But the resources, the momentum, and the strategic logic all point in one direction.
Kostyantynivka is no longer anyone's city. Russian soldiers have slipped into the eastern Ukrainian stronghold from multiple directions, and what remains is a contested space where neither side fully controls the ground. Ukrainian commanders insist the situation is manageable, but soldiers on the line tell a different story—one of slow, grinding Russian advances measured in meters per day, of dwindling resources, and of a strategic gateway that may not hold much longer.
The city sits at a crucial threshold. If Russian forces take it, the road opens toward Kramatorsk and Sloviansk, the last major Ukrainian-held cities in the Donbas. Seizing the Donbas region remains one of Moscow's core war objectives, and Kostyantynivka is the key that unlocks the rest. For months the broader front has stalled, with Ukrainian commanders claiming they have recaptured more territory than they have lost this year. Ukraine has struck Russian oil refineries deep inside Russia and disrupted supply lines running to occupied Crimea—so effectively that Russian-appointed authorities in Crimea suspended public fuel sales due to shortages. But in Kostyantynivka itself, the momentum has shifted.
Russian troops have advanced from the south and been spotted on the city's northern outskirts. Moscow claims its forces have encircled Ukrainian military units; Kyiv denies this, with Brigadier General Oleksandr Bakulin, commander of Ukraine's 19th Corps, insisting the situation remains under control. Yet Bakulin acknowledges roughly 130 Russian soldiers are still operating inside the city. A Ukrainian officer whose unit fights there offered a more candid assessment to the BBC: the Russians are accumulating more soldiers, and while Ukrainian forces still have cleanup and assault groups in the city, the advantage is shifting. The situation, he suggested, is far more serious than officials are willing to admit publicly.
The urban terrain itself has become a weapon in Russia's favor. Every building offers shelter; summer foliage provides cover. Russian soldiers have learned to move through the "kill zone"—the area where Ukrainian drones can spot and strike them—by using the city's density as camouflage. But Ukrainian drone operators face a critical constraint: Russian drone pilots have made them a priority target, using artillery, rocket launchers, and aviation to suppress Ukrainian crews. Meanwhile, those same Ukrainian operators are stretched thin, exhausted, and unable to expand their operations. One drone pilot explained the math bluntly: because his crews devote little time to hunting enemy pilots, Russian operators can move freely, detect Ukrainian positions, and force them to retreat. This is how the front line moves—not through grand maneuvers, but through attrition and the slow collapse of one side's ability to see and strike.
Russian forces are employing the same strategy that worked in other eastern cities: advance along the flanks to encircle and cut supply routes. Recent reports indicate Russian forces have seized villages to the west of Kostyantynivka. The Kremlin appears intent on taking the city quickly, perhaps to shift attention from Ukraine's deep strikes on Russian infrastructure and the fuel crisis those strikes have created. Russian drone units, now close enough to the city, are using cheap Chinese drones for surveillance—no need for sophisticated systems when you are nearly at your target.
Supply lines into Kostyantynivka have become a nightmare. Land routes are constantly targeted; large logistical drones are regularly intercepted. Ukrainian soldiers report they are not receiving the reinforcements needed to cover their losses. Commanders are reluctant to report lost positions because doing so triggers orders to retake them—orders that cannot be executed with the troops available. One soldier put it plainly: "We don't have enough people to hold on to what we still control, let alone organise assaults."
DeepState, a Ukrainian frontline monitoring project, has assessed that the fall of Kostyantynivka is a matter of time. Once it falls, logistics in the area will become even more complicated, and remaining in Kramatorsk will become extremely dangerous. The drone pilot who spoke to the BBC issued a warning: the situation has become a major crisis. Unless Ukraine changes its approach—unless it begins systematically destroying Russian logistics and targeting Russian pilots—the Russians will continue advancing.
For now, Ukrainian forces are still fighting inside the city. But the momentum, the resources, and the strategic position all seem to be moving in one direction. The question is no longer whether Kostyantynivka will fall, but when, and what that fall will mean for everything that comes after.
Citações Notáveis
They get into areas behind our backs and in urban conditions it's extremely difficult to push them out— Ukrainian drone pilot operating in the area
We don't have enough people to hold on to what we still control, let alone organise assaults— Ukrainian soldier whose unit is fighting in Kostyantynivka
A Conversa do Hearth Outra perspectiva sobre a história
Why does this particular city matter so much? There are other cities in Ukraine.
Kostyantynivka is the gateway. Once you control it, the road to Kramatorsk and Sloviansk opens up. Those are the last major strongholds in the Donbas. Losing this city doesn't just mean losing a city—it means losing the ability to defend what comes next.
The Ukrainian commanders say they still control it. The general says the situation is under control.
That's what they have to say publicly. But the soldiers actually fighting there are telling a different story. They're saying the Russians are accumulating more troops, that they don't have enough reinforcements to hold what they have, and that the pace of Russian advance, while slow, is relentless.
Why is the Russian advance so slow if Ukraine is struggling?
Urban warfare is brutal. Every building is a potential stronghold. But the real constraint on Ukraine is resources. Their drone operators are exhausted, outnumbered, and being hunted by Russian pilots. Without air superiority or the ability to disrupt Russian supply lines locally, they're fighting with one hand tied.
What would change the situation?
Ukraine would need to shift its strategy—stop just trying to hold ground and start systematically destroying Russian logistics and targeting Russian drone crews. Right now, Russian pilots operate almost freely because Ukrainian crews are too stretched to hunt them. That imbalance is how the front line moves.
So this is really about logistics and attrition, not heroic last stands.
Exactly. It's about who can sustain operations longer, who can see the battlefield better, who can move supplies and troops more effectively. Kostyantynivka is falling not because of a dramatic battle, but because Ukraine's ability to sustain the defense is breaking down.
And if it falls?
Then Kramatorsk and Sloviansk are exposed. The Donbas, which Russia has been trying to seize for years, becomes within reach. The war enters a new phase.