REPORT: Kostyantynivka — 53 Russian dead for every 3 Ukrainians, the numbers Putin denies

REPORT: Kostyantynivka — 53 Russian dead for every 3 Ukrainians, the numbers Putin denies

Introduction: Behind flags raised over ruins, the reality of the numbers

June 23, a figure that changes everything

On June 23, 2026, the deputy commander of the Ukrainian 19th Army Corps, Yuriy Madyar, delivered a figure no propaganda can erase: Russian forces in the Kostyantynivka direction are sustaining approximately 53 casualties per day, against 3 Ukrainian casualties. A ratio of 17 to 1. Against the victory rhetoric that Vladimir Putin has been broadcasting for months — declaring on June 23 that Russian troops were "practically reaching Kostyantynivka" — this figure is a stinging rebuttal. Not a political statement. Not an optimistic estimate. A precise operational accounting, provided by an officer commanding units in direct contact.

Kostyantynivka is the centerpiece of Russia's spring-summer 2026 offensive. It is the stated primary objective — the next fortress to seize in the logic of the Ukrainian Fortress Belt in the Donbas. Moscow had set a deadline: take the city before May 2026. That deadline was missed. The city holds. And the casualty ratio Madyar describes explains why this offensive is stalling in blood and rubble, with Russian columns failing to make any decisive advance.

The geography of attrition

Madyar added a critical tactical detail for understanding the balance of forces: Russian soldiers must walk 20 to 30 kilometers on foot to approach Kostyantynivka. Why? Because Ukrainian forces have established fire control over the logistics routes and supply lines around the city. Armored vehicles and supply trucks can no longer move freely — they are struck as soon as they appear. The result: Russian infantrymen advance on foot, exposed, exhausted, without adequate logistical support, in zones that the Ukrainian army surveys with its drones and strikes with increasing precision. It is a logistical hell that Putin never mentions.

The Fortress Belt — what Moscow refuses to understand

A defensive architecture designed to kill the Russian offensive

To grasp the stakes at Kostyantynivka, one must understand the concept of the Fortress Belt — the Ukrainian defensive architecture in central Donbas. Kostyantynivka, Druzhkivka, Kramatorsk, Slovyansk — these four cities form an interconnected fortified ensemble, defended in depth, with positions prepared over multiple years. This is not like Avdiivka or Bakhmut, cities that Russia encircled and progressively suffocated. The Fortress Belt is designed not to be encircleable — its cities support each other, its reserves can maneuver between them, and its defenses are built so every meter of advance costs the attacker disproportionately.

The ISW — the Institute for the Study of War — precisely documented Russia's build-up in this direction since March 2026: multiple army corps and combined arms armies concentrated around Kostyantynivka, 80% of attacking units reconstituted in men and equipment by June 6, 2026. Russia put considerable human and material resources into this offensive. And it is barely advancing. At the observed pace — less than 100 meters per day according to Ukrainian soldiers interviewed by the BBC in June 2026 — taking the entire city would take years. Years that Putin probably does not have, economically and demographically.

Infiltrations — neither advance nor control

Russia's strategy at Kostyantynivka relies on infiltrations — the insertion of small groups of soldiers (sometimes only two or three men) inside the urban perimeter, exploiting the complexity of the built environment to slip through. The ISW confirmed Russian infiltrations in several city districts — north, west, south, center. Estimates placed between 93 and 153 Russian soldiers infiltrated into the city as of June 15, 2026, according to brigade commander Alexandre Bakulin. Some Russian milblogger sources cited 250 to 300 — figures Ukrainian officers consider exaggerated.

Infiltration is not control. The ISW was precise on this point in its repeated assessments: the presence of Russian soldiers in buildings in Kostyantynivka does not mean Russia controls those zones in the doctrinal sense. Controlling terrain means maintaining an organized device capable of repelling counterattacks, securing logistical axes, exercising authority over the population. Russian infiltrators in Kostyantynivka do none of this — they cling to isolated buildings, depend on drone resupply, and are regularly eliminated by Ukrainian clearing operations. Madyar stated it clearly: there are far more Ukrainian soldiers in the city than Russian ones.

Madyar — the voice of the field against palace propaganda

An officer who names things

Yuriy Madyar, deputy commander of the 19th Army Corps, is not a communicator. He does not speak from a desk in Kyiv. His testimony of June 23, 2026 carries the authority of someone as close to combat as possible. What he describes — 53 Russian casualties against 3 Ukrainian, enemy soldiers marching dozens of kilometers on foot because they cannot use their vehicles — is the concrete result of the attrition doctrine the Ukrainian army is applying methodically since the start of the 2026 offensive.

That doctrine rests on a simple but difficult-to-execute principle: prevent Russia from concentrating forces and resources at the point of contact. To do this, strike in depth — not only at the front line but 20, 30, 50 kilometers behind the front — hitting logistics depots, assembly points, resupply columns, drone launch sites. A battalion commander of unmanned systems operating in the Kostyantynivka direction declared on June 5, 2026 that his units hold fire control over Russian logistics to 50 kilometers of depth, striking every morning and evening the convoys that try to supply the combat zone.

Russian flags on buildings — a documented lie

Kremlin propaganda reached a particularly cynical level in the case of Kostyantynivka. On June 17, 2026, the Russian Ministry of Defense published images purportedly showing Russian soldiers hoisting flags in the city. The ISW analyzed these images and concluded they appeared to be artificially intelligence-altered. This is not a trivial accusation — it is the description of a systematically falsified information campaign, using advanced technological tools to create nonexistent proof of victories that never happened.

Russian milbloggers themselves — who follow the war with more precision than the Kremlin's official sources — acknowledged on June 28, 2026 that it is "premature" to speak of the capture of Kostyantynivka, as Ukrainian forces continue to operate in the central part of the city. This admission, coming from a source usually favorable to the Russian army, says everything about the gap between ground reality and Moscow's official narrative.

Putin says "practically there" — what it really means

The vocabulary of defeat redressed as victory

In a public statement on June 23, 2026, Vladimir Putin declared Russian forces were "practically reaching" Kostyantynivka. He acknowledged in passing that Ukrainian forces hold positions in buildings and are conducting counterattacks — a form of partial admission of reality. But the phrase "practically there" deserves to be unpacked. Russia has been attempting to approach Kostyantynivka since at least March 2026, when it massively intensified operations in this direction. Months of intense offensive, considerable resources, and we are at "practically there" — a phrase that commits to nothing and conceals minimal advance at maximum cost.

The ISW noted that Russian forces have infiltrated less than 13% of Kostyantynivka's territory since October 2025, when the first infiltrations into the city began. In eight months of intense effort, deploying multiple armies and army corps, Russia has infiltrated only a fraction of the city — and still without exercising effective control. Putin saying "practically there" in June 2026 for a city he wanted to take before May 2026: that is the admission of a failure that the vocabulary of victory cannot mask indefinitely.

Encirclement claims — denied by Madyar

Russian sources have repeatedly claimed that Ukrainian forces in Kostyantynivka are "encircled" or on the verge of being so. Madyar explicitly denied those claims on June 23, 2026. He also indicated that Ukrainian forces were actively clearing the southern zone of Kostyantynivka, with a "minimum number" of Russian soldiers left in that zone after operations. This is not the description of an army in the process of being encircled — it is the description of an army counterattacking and retaking ground.

The ISW documented that reports of Ukrainian presence in the southern and western sectors of the city directly contradict the claims of rapid advances broadcast by the Russian Ministry of Defense. Geolocated proof published shows Ukrainian soldiers operating in areas where Russian sources claimed to have "secured" positions. These contradictions are not anomalies — they are the systematic proof of a Russian information campaign deliberately disconnected from operational reality.

Russian tactics at Kostyantynivka — permanent adaptation

Glide bombs as attrition lever

Russia has adapted its tactics at Kostyantynivka to compensate for its difficulties advancing on the ground. According to the ISW, Russian forces intensified the use of guided glide bombs — FAB-1500 and FAB-250 — in the Kostyantynivka-Druzhkivka zone. These weapons, launched from Russian aircraft outside the range of Ukrainian air defense systems, allow the destruction of buildings and defensive positions without exposing infantry soldiers. A Ukrainian brigade operating in the area reported on June 24, 2026 that glide bomb strikes against Druzhkivka had significantly increased over the preceding month.

These strikes are one of the most difficult problems for Ukrainian defense. Glide bombs are launched from altitudes and distances that make interception very difficult with available systems — and each successful interception consumes costly missiles. The Ukrainian response involves partly striking the carrier aircraft and their bases — a long-range strategy that has borne fruit, with several Russian aircraft destroyed on the ground or in flight since the start of 2026. But the challenge remains acute.

Night infiltrations and summer foliage

The ISW documented a seasonal Russian tactical adaptation: Russian forces are using summer foliage for camouflage during their infiltration movements at Kostyantynivka. A commander of the Russian 1194th Brigade admitted it on June 26, 2026: foliage provides cover against Ukrainian drones that otherwise completely dominate the combat space. Trees, hedges, urban plantings become precious tactical resources for Russian infiltrators.

In response, Ukrainian units have adapted their techniques. A Ukrainian brigade operating at Kostyantynivka reported on June 26, 2026 that it is equipping its armored vehicles with specific anti-drone protections, anticipating ambushes that Russian forces are setting up from wooded areas and bushes along roads. This is the drone war in its most concrete expression: constant adaptation, at an accelerated pace, where each tactical advantage is counter-measured within weeks of its appearance. Ukrainians maintain this pace. Russians struggle to keep up.

Russian casualties at Kostyantynivka — the ruthless arithmetic

More than 2,000 casualties in six days at the start of June

The figure of 53 casualties per day in the Kostyantynivka direction fits into a context of overall Russian losses that staggers the mind. Robert Brovdi, commander of Ukraine's unmanned systems forces, reported on June 7, 2026 that Russian forces suffered 2,096 casualties — killed and wounded — in just the first six days of June. These are Ukrainian figures that cannot be independently verified, but their consistency with trends documented by varied sources, including some informal Russian sources, lends them relative credibility.

The pace of these losses is unsustainable long term. Russia is reconstituting its units — according to the ISW, 80% of units attacking Kostyantynivka were reconstituted by June 6 — but this reconstitution consumes men from across Russia, with increasingly short training and increasingly limited experience. Fresh units arriving at the front often have less than two weeks of preparation. They face a battle-hardened Ukrainian army, on terrain it knows, with drone systems giving it superior situational awareness.

Ukraine liberates more territory than it loses

A striking fact, documented by the ISW, rewrites the narrative of this phase of the war: in May 2026, Ukraine liberated or eliminated Russian positions from approximately 250 square kilometers of territory, while Russia only seized 130. In April 2026, Ukraine had recovered approximately 116 square kilometers against only 28 seized by Russia. These figures contradict the entire Russian narrative of inexorable advance. The cartographic reality, verified by satellite imagery and independent geolocated data, shows a territorial balance of forces in Ukraine's favor since the start of 2026.

The source affiliated with Ukrainian military intelligence cited by the ISW on June 1, 2026 was unambiguous: Russian advances in May 2026 were "negative" in the overall territorial balance. Militarnyi, drawing on Ukrainian military sources, reported on June 6, 2026 that Ukraine liberated more territory in May 2026 than Russia seized. This is not propaganda. This is cartography.

The cognitive war around Kostyantynivka — a case study

The Kremlin invests in perception more than in terrain

The battle of Kostyantynivka has become a textbook case of Russian cognitive warfare. As early as June 13, 2026, the ISW noted a behavioral shift by the Russian Ministry of Defense: it began publishing unusually detailed "hyper-tactical" reports on its progress at Kostyantynivka — number of buildings seized, street names, precise positions. This level of detail is abnormal for official MoD Russian communications. The ISW identified it as a warning signal: this level of detail is not meant to inform but to saturate the information space with specific claims that are difficult to verify or quickly refute.

This campaign of precise narratives — "96 buildings seized June 16-17," "172 buildings June 12-13" — accompanied the publication of AI-generated images showing Russian flags on positions. The objective was not to convince military experts — geolocated evidence contradicted these claims almost immediately. The objective was to create a sufficient mass of numerous and detailed content so that non-specialized media, politicians, and Western public opinion would integrate a general impression of imminent Russian advance — even without believing the precise figures.

Russian milbloggers — the second defeat signal

Within the vast ecosystem of Russian milbloggers — military commentators who follow the war on Telegram channels with hundreds of thousands of subscribers — the discourse on Kostyantynivka is revealing. In June 2026, several of them admitted difficulties the official communication refuses to acknowledge: supply problems for Russian positions in the northern part of the city, high losses, the slowness of advance. On June 28, 2026, one of them explicitly stated it is "premature" to speak of the capture of Kostyantynivka.

These milbloggers are not objective sources — they are generally pro-Kremlin and pro-Russian army. When even they temper official claims, it is because the reality is so far from the official narrative that it can no longer be entirely ignored without losing all credibility. This is an indirect but significant indicator of the actual state of the Russian offensive at Kostyantynivka: even the most ardent supporters are beginning to distance themselves from promises of imminent victory.

The 19th Corps — the unit holding the line

A formation built for this battle

The Ukrainian 19th Army Corps, of which Madyar is the deputy commander, is the main unit responsible for defending the Kostyantynivka direction. This corps was specifically constituted and trained to defend this part of the Donbas — an organization reflecting the Ukrainian doctrine of assigning permanent units to defense sectors they learn in depth. The commanding general is Brigadier General Alexandre Bakulin, who has spoken publicly on several occasions about the situation in the city, providing precise figures on the number of Russian infiltrators and tactical developments.

This level of transparent communication from Ukrainian officers contrasts sharply with the silence or lies of Russian officers. Bakulin, Madyar and their colleagues give figures, explain their tactics, acknowledge difficulties — something no Russian officer can do in the Kremlin's closed information system. This transparency is both a strategic communication tool and a sign of confidence in the solidity of the defensive position. One does not speak openly about difficulties when on the verge of collapse.

Clearing the southern sector — active counter-pressure

Madyar specified on June 23: Ukrainian forces carried out clearing operations in the southern sector of Kostyantynivka, leaving a "minimum number" of Russian soldiers in the zone. He also announced that operations are underway to push Russian forces back from the center and west of the city. This is not a force in passive defensive position — it is a force that is actively counterattacking, exploiting the favorable casualty ratio to maintain constant operational pressure on the infiltrators.

This active posture is consistent with the general principle documented across the Ukrainian front since the start of 2026: Ukraine is no longer content to hold its lines. It counterattacks locally when opportunities arise, strikes in depth to deny Russian assembly zones, maintains intensive reconnaissance activity to identify and strike enemy forces before they concentrate sufficiently for a breakthrough. It is an active defense, costly in energy but effective in terms of casualties inflicted.

The geopolitical logic of Kostyantynivka — why it matters for Moscow

Beyond tactical value — political symbolism

Kostyantynivka is not just a city. It is the symbol of the next step in Russia's conquest of the Donbas — and, in Putin's logic, the key to unlocking the entire Slovyansk-Kramatorsk agglomeration, the administrative and economic capital of the region still under Ukrainian control. Taking Kostyantynivka means opening the road to Druzhkivka, then Kramatorsk. Not taking it means admitting that the 2026 offensive — prepared through winter, massified in spring — has failed at its primary objectives.

This political dimension explains Russia's disproportionate investment in the information campaign around Kostyantynivka. If the army cannot win on the ground, the Kremlin needs the victory narrative maintained for both internal and international audiences. Internal audiences — because Putin needs to justify the human and economic cost of the war to a population beginning to feel the effects of sanctions. International audiences — because every week he can claim Ukraine is about to collapse, the diplomatic pressure for a peace deal favorable to Russia increases.

The impact on hypothetical peace negotiations

The military situation at Kostyantynivka has direct resonance in discussions, still embryonic, about a possible peace process. Russia wants to negotiate from a position of perceived strength — being able to claim it is "about to take" important cities gives Russian negotiators psychological leverage. The documented reality from Madyar and the ISW — a 17 to 1 casualty ratio, zero advance for months — fundamentally contradicts that position. And that is precisely why these figures must be made public and amplified.

Zelensky and Ukrainian commanders understand the diplomatic dimension of military communication. By allowing officers like Madyar to speak publicly about enemy casualties and ground reality, they send a message to Western capitals and potential mediators: Ukraine is not negotiating from a desperate position. It negotiates — if it negotiates — from a position of solid defense, effective attrition, and intact operational capacity.

The civilian situation — what the numbers don't say

A city under glide bombs

Behind the military casualty figures lies a civilian reality that tactical reports do not fully capture. Kostyantynivka was, before the war, an industrial city of approximately 70,000 inhabitants. Since the 2026 escalation, the vast majority of the population has been evacuated — Ukrainian authorities have conducted sustained evacuation operations throughout the central Donbas combat zone. But civilians remain — elderly people who refuse to leave, people who cannot leave, essential workers maintaining some minimal services.

Those civilians live under Russian glide bomb strikes. ISW reports document strikes on Druzhkivka, the neighboring city, struck regularly. White phosphorus fired on civilian neighborhoods of Kostyantynivka was documented on June 3, 2026 — a weapon whose use against civilian targets is prohibited by Protocol III of the Convention on Certain Conventional Weapons. The humanitarian organization Proliska reported on June 3, 2026 that Russian forces struck a clearly marked humanitarian evacuation vehicle with an FPV drone in the Druzhkivka direction. These are documented war crimes added to an already immense list.

Ukrainian human attrition — the inevitable toll

The 53 to 3 ratio is favorable. It must not obscure the fact that the 3 Ukrainian casualties per day in this one direction represent soldiers, sons, fathers, friends. Accumulated over months, they weigh on a Ukrainian society already scarred by more than four years of large-scale war. Ukraine holds. It holds remarkably well. But it pays a real, daily, painful human price. Acknowledging this price does not weaken support for Ukraine — it humanizes it. And humanizing it is necessary so that Western societies understand what they are supporting: not a geopolitical abstraction, but concrete people dying to defend their country.

That is why the sanctions, weapons, and funding that the West provides are not charity. They are the counterpart to a sacrifice that the Ukrainian people assume to defend values the West claims to share. If those values — democracy, national sovereignty, international law — are worth defending by Ukrainians at the cost of their lives, they are worth supporting by Western democracies at the cost of military spending and economic sanctions.

The lessons for the rest of the war

Attrition as a winning strategy

The battle of Kostyantynivka confirms something important about Ukrainian strategy since 2026: deliberate and targeted attrition works. Not passive attrition — holding positions and waiting to be overwhelmed. Active attrition — striking in depth to prevent concentration, denying logistical lines, imposing such a high human cost that the adversary cannot maintain the offensive tempo. This strategy demands perfect integration between drone capabilities, long-range missiles, artillery, and intelligence — integration that the Ukrainian army has developed and refined with the help of its Western partners.

It also demands time. Attrition is not spectacular. It does not produce dramatic breakthroughs. It produces casualty ratios, cartographic balances, timelines that stretch out for the adversary. This is not the kind of victory that makes headlines. But it is the kind of victory that, accumulated over months, eventually makes the adversary's offensive economically and demographically unsustainable.

The next phase — maintaining pressure

The question is: how long can Russia sustain a ratio of 53 casualties per day in the single Kostyantynivka direction — not counting other axes of effort — before the human and economic costs make continuing the offensive untenable? Demographers estimate Russia still has human reserves, but that each year of war depletes them. The generation of young Russian men of fighting age is a finite resource. Partial mobilization contracts, engagement bonuses, forced prison recruitment — all of that has limits.

Ukraine knows this. And that is why maintaining pressure — militarily, economically through sanctions, politically through international coordination — is the correct strategy. Every day the casualty ratio at Kostyantynivka remains at 17 to 1 is a day that brings Ukraine closer to a moment when Russia will either accept a just peace, or collapse under the weight of its own losses.

Media coverage — what is said and what is not

The coverage bias in favor of Russian declarations

A problem of international media coverage that affects public perception of this war must be named. Putin's declarations about the "imminent capture" of Kostyantynivka or the Russian MoD's claims about hundreds of buildings seized often receive immediate and broad coverage in international media. The documented rebuttals from the ISW, the precise figures from Madyar, the cartographic analyses contradicting those claims receive far less attention.

This bias is not necessarily intentional — it reflects media tendency to cover official statements and dramatic events rather than detailed analyses. But it produces a systematic effect: the international public receives a narrative of the war that overrepresents Russian narratives and underrepresents the analyses that dismantle them. This imbalance has political consequences — it feeds doubts about Ukrainian capacity to hold and indirectly legitimizes pressure for a premature ceasefire.

The role of independent analysts

In this context, the role of organizations like the ISW is crucial. Their daily assessments — based on geolocated data, satellite imagery, multiple sources — offer a documented alternative to the official narratives of both parties. Their methodology, transparent and regularly described, grants them credibility that even actors hostile to their conclusions must acknowledge. When the ISW says Russian claims about Kostyantynivka are false, it is not a partisan judgment — it is an analytical conclusion grounded in verifiable evidence.

International media should draw more systematically on these analyses to contextualize official statements. "Russia claims to have seized X buildings, but the ISW could not confirm these claims with geolocated evidence" — this type of journalistic rigor is possible, practiced by some media outlets, but not yet standard. Making it standard would be a significant service to truth and democracy.

Drone intelligence — the weapon that changes the ratio

Permanent surveillance that denies Russian concentrations

The ratio of 53 Russian casualties to 3 Ukrainian cannot be explained by superiority in men or equipment. It is explained largely by Ukrainian dominance in surveillance and strike drones. Ukrainian forces operating in the Kostyantynivka direction maintain a near-permanent presence of reconnaissance drones over Russian lines — identifying troop movements, supply convoys, assembly points before assaults. This real-time surveillance enables striking Russian forces before they concentrate in sufficient numbers to constitute a threat. This is the principle of the accelerated kill chain — from detection to strike in minutes.

The commander of an unmanned systems battalion operating in the zone declared on June 5, 2026 that his units exercise fire control over Russian logistics to 50 kilometers of depth, striking every morning and evening the convoys trying to move toward the combat zone. These systematic strikes on enemy logistics create the effect Madyar described: Russian soldiers who must walk on foot 20 to 30 kilometers to reach their positions, without armored support, without guaranteed resupply, exhausted before even making contact.

Targeting Russian drone launch sites

The ISW documented an important Ukrainian tactical change in June 2026: the shift from a tactic targeting Russian drone antennas to a broader tactic including launch sites, equipment, and personnel at those sites. This tactical change reflects an evolving doctrine: not just disrupting Russian drone operations after deployment, but destroying the infrastructure that makes them possible. A Russian FPV destroyed at its launch site with its operator is worth more strategically than ten disrupted antennas — because it will not be replaced as easily as the antenna.

This constant pressure on Russian drone operations in the Kostyantynivka zone contributes directly to the favorable casualty ratio for Ukrainians. Russians who lose their drones also lose their ability to survey Ukrainian defensive positions — forcing them to send human scouts instead. Those human scouts are more vulnerable, more predictable in their movements, and their loss is harder to absorb operationally. This is the attrition spiral in which the Russian army is caught at Kostyantynivka.

The front lines in ten years — what Kostyantynivka decides

A city that conditions the geography of peace

The battle of Kostyantynivka is not only about the city itself. It conditions the geography of any future settlement in the Donbas. If Kostyantynivka falls — which is not imminent according to all available data — it opens the road to Druzhkivka, Kramatorsk, and Slovyansk. The loss of this industrial and administrative agglomeration would represent a strategic catastrophe for Ukraine, significantly reducing its negotiating position in any peace process. Holding it means maintaining a crucial territorial lever.

Russia understands this, of course. That is why it concentrates such considerable resources in this direction despite the casualties. For Putin, every advance at Kostyantynivka — however minimal, however costly — is an improvement to his negotiating position. For Ukraine, holding the city is not merely defensive — it is the exercise of a territorial sovereignty that any peace agreement will have to take into account. The map on the day peace comes will largely be determined by the front line map on the eve of that day.

The Fortress Belt — an investment that pays off

The fortifications at Kostyantynivka and throughout the entire Fortress Belt represent years of investment in defensive works — trenches, reinforced positions, anti-tank obstacles, buried communication networks. These investments were sometimes criticized in the early phases of the war as insufficient or poorly positioned. But the 2026 experience validates their fundamental principle: defense in depth, prepared, transforms even the most determined offensive into a slow hemorrhage. Russians pay the price of every meter with blood, and that equation changes political calculations even in the Kremlin.

The example of Kostyantynivka should serve as a model for rebuilding Ukrainian defenses in other sectors. A post-war Ukraine that massively invests in a "Fortress Belt"-type defensive architecture at the scale of its new borders — whatever those may be — will be a Ukraine that deters any future aggression far more credibly than diplomatic promises alone.

Conclusion: Kostyantynivka holds, and the ratio speaks for itself

A city that defies Moscow's predictions

Kostyantynivka was supposed to be taken before May 2026. It was not. It was supposed to be "practically reached" in June 2026 according to Putin — and Russian forces struggle to maintain fewer than 200 infiltrators in a handful of buildings in a city spanning several kilometers of perimeter. Meanwhile, Ukrainian forces are clearing the southern sector, planning operations in the center and west, and maintaining a casualty ratio of 17 to 1 in their favor. This is not the description of a city falling. It is the description of a city holding — with intelligence, with competence, with sacrifice.

The figure of 53 to 3 that Madyar provided on June 23, 2026 should be remembered. Not as a figure of Ukrainian propaganda — but as operational data consistent with all other available data on the battle: overall Russian casualties, the documented slowness of advance, even the acknowledgment of Russian milbloggers, independent geolocated evidence. When all these sources converge, they say the same thing: the Russian offensive at Kostyantynivka is not advancing. It is bleeding. And it is Ukraine that holds the knife.

What the West must understand

The lesson of Kostyantynivka for Ukraine's Western partners is simple: continue. Continue providing the weapons enabling active defense. Continue maintaining the sanctions exhausting the Russian war machine. Continue supporting the intelligence and counter-information missions enabling the ISW and serious media to document reality against Kremlin propaganda. Do not be deceived by Russian narratives of imminent victory — and do not yield to pressure for a ceasefire that freezes military gains that Russia has not actually achieved.

Ukraine is not asking the West to fight in its place. It is asking for the tools to fight itself. And what it does with those tools — at Kostyantynivka and elsewhere — should convince even the most hesitant that this investment is worthwhile. 53 to 3. That is Ukraine.

By Maxime Marquette, columnist

Columnist's transparency note

My sources and their scope

This report draws primarily on the ISW's daily assessments for June 2026, in particular the assessment of June 23, 2026 containing Yuriy Madyar's statements about 53/3 casualties, southern clearing operations, and the 20-30 km march. The casualty figures cited — 53 Russian versus 3 Ukrainian per day — come directly from that source. Cartographic data on territorial advances and retreats also comes from the ISW and its assessments. Putin's statements about the "imminent capture" of Kostyantynivka are documented in the ISW assessment of June 23, 2026. Information on white phosphorus strikes and struck humanitarian vehicles comes from the assessments of June 3, 2026.

Casualty figures in an armed conflict are difficult to verify independently. Ukrainian data on Russian casualties tends to run higher than independent estimates, and Russian data on Ukrainian casualties is clearly underestimated. I indicate the origin of each cited figure to allow the reader to evaluate its credibility with this caveat in mind.

My declared editorial biases

I am pro-Ukrainian and consider the defense of Kostyantynivka to be an example of military competence and civilian resilience that deserves to be documented precisely. My analysis of Russian declarations is skeptical because the available documentation — particularly independent geolocated evidence — supports that skepticism. I acknowledge that certain cited figures (particularly casualties) cannot be verified independently and indicate their source transparently.

Sources

Primary sources

ISW — Russian Offensive Campaign Assessment, June 23, 2026 — Madyar's statements on 53/3 casualties, southern clearing operations, 20-30 km march — June 24, 2026

ISW — Russian Offensive Campaign Assessment, June 12, 2026 — 100-250 Russian infiltrators, Kostyantynivka as primary spring-summer 2026 objective — June 12, 2026

ISW — Russian Offensive Campaign Assessment, June 28, 2026 — milblogger acknowledges prematurity of capture claims — June 28, 2026

ISW — Russian Offensive Campaign Assessment, June 20, 2026 — cartographic update, north/northwest/west infiltrations — June 20, 2026

Secondary sources

Euromaidan Press — Over 2,000 Russian casualties in first six days of June, Madyar — June 7, 2026

ISW — Assessment June 6, 2026 — Ukraine liberates more territory than Russia seizes in May 2026 — June 6, 2026

ISW — Assessment June 25, 2026 — Russian cognitive war on Kostyantynivka, FAB-250/FAB-1500 glide bombs — June 26, 2026

ISW — Assessment June 22, 2026 — Ukrainian soldiers to BBC: serious but not catastrophic situation, less than 100 meters/day — June 23, 2026