Russia's 2026 Spring Offensive: Grinding Toward Sloviansk Against the Fortress Belt

When Vladimir Putin launched the full-scale invasion of Ukraine in 2022, he appears to have imagined a task no more strenuous than a quick trip to the corner store. You bring your wallet—in this case your army—maybe talk to the person at the register, perhaps shell a few dozen cities along the way. All in all, not an especially complicated errand.

Now imagine stepping into the street to make that trip and meeting an entire brigade of neighbors armed to the teeth, behind defenses so complete that four years later you are still only halfway down the block. The buildings around you are half blown apart and smoking, and you still haven’t gotten the beer.

That is the situation Russia finds itself in as its 2026 spring offensive grinds forward. After more than four years of fighting—at a cost of over a million killed and wounded—Moscow still controls only 20 percent of Ukraine, a figure that includes the Crimean Peninsula it annexed back in 2014. Over that span, the “special military operation’s” stated goals have collapsed from storming Kyiv in three days to merely securing full control of the Donbas region, an objective now achievable only at staggering cost.

This is a war of attrition with no end in sight, where a battered Russian army throws record casualties against a fortified, drone-saturated front to win advances measured in meters rather than kilometers.

A Battered Army in Year Four

One of Moscow’s central problems in the fourth year of war is the sheer condition of its army. Citing a February article by Dmitry Kuznets, a military analyst at the Carnegie Russia-Eurasia Center, Russian recruitment runs at roughly 30,000 to 40,000 contract soldiers each month. But Western officials speaking to WarFronts say Russia’s month-over-month personnel losses have outpaced that recruitment since at least December. March was especially brutal, producing a record-high number of Russian casualties after the first major push of the spring offensive.

This does not spell doom for the Russian military, but it is far from optimal. Recruitment has grown expensive, with ever-larger sign-on bonuses needed to tempt new soldiers, and the quality of those recruits has noticeably declined. Under the current system, socially disadvantaged citizens—the unemployed and those serving prison time—make up a significant share of new arrivals, meaning more poorly qualified personnel on the front lines.

Sweetening the Pot and Hidden Mobilization

In pursuit of better-qualified troops, Moscow has launched a recruitment campaign aimed specifically at drone operators, a role that demands more discipline and training than most. The pitch is notable for its terms: a one-year contract, rather than the open-ended “you’re with us until the war ends” arrangement most Russian soldiers have signed.

The Kremlin is reworking conscription elsewhere too, though less in a sweetening-the-pot spirit and more in a “how do we find more conscripts without sparking riots” one. On 20 March, the local government of one Russian province ordered businesses with more than 150 employees to nominate two to five workers for conscription. Folding businesses into the recruitment machinery creates a mechanism for hidden mobilization that bypasses the need for any official announcement. There are reports Moscow is preparing similar efforts in major population centers—something Putin has largely avoided until now.

Counting the Dead

Such drastic measures grow more necessary as Russian deaths climb. The database maintained by Mediazona and the BBC—which counts a fatality only when it is 100 percent confirmed—records more than 213,000 Russian troops killed in the special military operation. That is more than the all-cause death totals for American forces in Korea, Vietnam, and World War One combined. And because these are only the confirmed dead, the true total is almost certainly far higher.

The grim arithmetic is the point. A stated Ukrainian aim is to attrit Russian forces faster than they can be replaced—killing more men each month than Moscow can recruit. There are already reports that Russian recruitment is running 15 percent below where it needs to be. Layer on Ukraine’s drone strikes against logistics routes and military warehouses, which choke the delivery of weapons, fuel, and troops, and the picture is of a force being ground down at both ends.

Economic Whiplash on the Oil Front

Alongside mounting casualties, Moscow has endured a bout of economic whiplash. The war in Iran and the related closure of the Strait of Hormuz drove up demand for Russian oil, and the United States suspended some sanctions in recognition of the global need. The price per barrel of Russian crude spiked to twice its pre-war average, delivering a stabilizing influx of revenue to a strained economy.

That relief proved short-lived. A series of Ukrainian drone attacks on Russian oil terminals and refineries along the Black and Baltic Seas have all but negated the boost. The damage to export capacity has been severe enough that Russian oil companies have been forced to cut production and may even declare force majeure—not because they cannot produce the oil, but because they cannot physically deliver it.

The numbers are stark. According to The Russia Program at George Washington University, Russian oil exports plunged 43 percent in the span of a single week following the attacks. Despite prices holding at a 13-year high, oil export revenue fell from $2.45 billion to $1.44 billion.

The reduction has been pronounced enough that an unspecified ally reportedly asked President Volodymyr Zelenskyy to ease off attacks on Russian energy infrastructure, at least while the global energy crisis sparked by the war in Iran continues. Given that the United States is the only country to have lifted sanctions on Russian oil during the war Russia started—while EU nations have held firm—it does not seem a wild guess that the “unspecified ally” is quite possibly Washington.

Cracks in the Home Front

Dissent has begun appearing in the most unexpected corners of Russian society. Ilya Remeslo, a lawyer and until recently a pro-Putin firebrand, made headlines in March with a Telegram post titled “Five reasons why I stopped supporting Vladimir Putin.” In it he branded the invasion a “dead-end war,” protested the suppression of internet access, and went so far as to declare that “Putin must resign and be brought to justice as a war criminal and a thief.”

The reversal is striking. Remeslo had been on Moscow’s payroll as a pro-Kremlin blogger and was at least partially responsible for the 2021 arrest, and subsequent death, of Alexei Navalny.

More recently the typically pro-Kremlin celebrity Victoria Bonya released a video warning Putin that most of the country was too afraid of him to tell him honestly what was happening, naming flooding, livestock culls, internet blackouts, and financial strain on small businesses. Some suspect the video was staged, noting the Kremlin’s gentle response rather than committing her to an asylum—but the appearance of such complaints at all is telling.

The Information Blackout

If you are Vladimir Putin amid all this, you likely want tight control over what your population can see. To that end, internet shutdowns in Moscow and other major cities are becoming longer and more severe, alongside expanding restrictions on which apps and websites Russians may access—including Telegram, which the vast majority of Russians rely on for nearly everything.

Moscow justifies the restrictions on “security” grounds, alleging that Ukrainian drones can exploit Russian mobile networks for navigation and targeting, and that Telegram is insufficiently secure. Experts counter that the blackouts more closely resemble measures used to suppress or pre-empt mass demonstrations. The crackdown has fueled theories that Putin is trying to further isolate the public ahead of new conscription drives. Given how matters stand on the front lines, keeping Russians in the dark about the war may be more important to the Kremlin than ever.

Sloviansk and the Fortress Belt

Turning to the battlefield itself, one of the main thrusts of the spring offensive points toward Sloviansk, a Ukrainian city that currently sits about 13 kilometers from the front line. Were the attacks eventually to succeed, Sloviansk would be the largest city Russian forces have taken in years. Achieving it is another matter entirely.

Sloviansk is the northern anchor of Ukraine’s fortress belt, an extraordinarily fortified stretch of the Donbas that has held Russian forces at bay for years. The short version: these cities will be extremely hard to take. To reach Sloviansk, Russian forces must first grind through outlying towns and villages such as Rai-Oleksandrivka and Platonivka, along with the town of Lyman, where Ukraine has already repelled several attempts to take ground.

That alone will be costly. The campaign for Pokrovsk offers the template: it took the Russians nearly two full years of frontal assaults, advancing in increments of dozens of meters, to finally seize the city in December 2025—at the cost of immense resources and lives. A city twice the size of Pokrovsk, embedded in a region literally nicknamed “The Fortress Belt,” will not somehow be easier.

The Kill Zone and a War of Meters

Recent casualty reporting underscores the cost. Since the offensive began, Russian forces have suffered eye-watering losses; Ukrainian officials reported record highs in the second half of March after a late-February lull. That lull reflected a deliberate decrease in Russian assaults as forces spent several weeks preparing a larger attack. Yet despite the preparation, the offensive’s first push left nearly 5,000 Russians killed or injured in just three days.

The reason advances are so slow and so lethal is the drone. In September of last year, the International Center for Defence and Security (ICDS) described how the density of reconnaissance and attack drones had “effectively established a five- to ten-kilometre-deep ‘kill zone’ along the contact line,” rendering conventional fortifications—wide trenches, large dugouts, concentrated strongpoints—“highly vulnerable and increasingly unusable.” That kill zone has since widened to as much as 35 kilometers in places, limited mainly by the range of the first-person view (FPV) drones patrolling the lines.

The consequence is that the front is, by necessity, held by only small clusters of troops spread across vast areas. Tanks cannot move without being spotted. A lone soldier on foot, horseback, or motorbike might slip through, but that yields only the most localized of gains.

A Hard War for Kyiv Too

None of this means Kyiv has it easy. Ukrainian recruitment is its own uphill battle, and the shortage of fresh troops means soldiers already on duty rotate off less often, breeding fatigue and record rates of absence without leave. Elite units are stretched thin, since shoring up one sector can leave another more exposed. Drone warfare has helped bridge the manpower gap, but this remains a hard, difficult war for Ukraine.

Analysts generally agree things are going better for Kyiv than in 2025, yet many Ukrainians are still dying to defend their homeland.

Should Russian forces reach the outskirts of Sloviansk—likely months upon months and tens of thousands of lives away—the fighting would change shape. Russia’s tried-and-tested approach is to pulverize a city into rubble, plant a flag, and declare victory. But Avdiivka and Pokrovsk showed Ukrainians can hold out for literal years under those conditions. Instead, Russia would likely try to filter small units into the city to establish positions for asymmetric drone warfare—a massive hurdle, given that Ukrainian drone operators have spent the war developing tactics built for exactly this environment, tactics likely to create severe problems for advancing forces.

Drones Dominate the Deadlock

Knowing the defenses Ukraine is packing, a push on Sloviansk looks like Moscow waltzing into a disastrous, drawn-out battle at a moment when Kyiv is well-equipped to make it pay. Ukraine now produces seven or eight million drones a year—more than any democracy in the world—and deploys them to devastating effect. Western officials speaking to WarFronts say drones now account for well over 80 percent of all casualties being inflicted at this stage of the war, a figure that includes vehicles as well as personnel.

Yet for all the spectacle of Russia’s massive aerial bombardments and Ukraine’s interceptions, the front line remains in deadlock—a grinding war of attrition where gains are measured in meters, not kilometers. As Emil Kastehelmi of the Finland-based Black Bird Group put it, “just because for one or two months Russia has slower gains than Ukraine, does not necessarily mean there’s been a great shift.”

The Other Fronts: Kharkiv, the Oskil, and Zaporizhzhia

The offensive is by no means confined to Sloviansk or even the fortress belt. The Institute for the Study of War highlights three or four main areas of fighting. Near Kharkiv, a city about 30 kilometers from the pre-war Russian border and roughly 20 kilometers from the front, Russian forces are trying to push Ukrainian troops back to create a defensible buffer from which to eventually shell the city. This front has seen many assaults by small teams on motorcycles but little movement since the Kremlin opened it in 2024.

Also in Kharkiv Oblast lies the Oskil River, which Russia wants to cross to take Kupyansk and push into eastern Kharkiv and northern Donetsk. Russian soldiers here have apparently decided motorbikes were too flashy, opting instead to infiltrate through disused gas pipelines—crawling or even driving through them for hours or days to enter Ukrainian territory. That approach has not yet succeeded at Kupyansk, but attacks on Ukrainian frontline communications and supply infrastructure have caused shortages severe enough that two commanders have been dismissed or demoted for failing to manage them.

Further south in Zaporizhzhia, Ukrainian Lieutenant Colonel Vitaliy Gersak predicts fighting will intensify as the ground dries from the winter mud. Late in March, power was briefly lost at the Russian-occupied Zaporizhzhia nuclear plant, prompting the International Atomic Energy Agency to call for a localized ceasefire so repairs could be done safely. The regional capital has begun fielding incoming FPV exploding drones piloted by Russian forces, raising the worrying prospect that the “human safaris” Moscow’s troops have conducted against civilians in Kherson may come to Zaporizhzhia.

Counterattacks and a Stalemate at the Table

Across the board, Russia’s minimal advances have cost it dearly. Ukrainian defenses are well dug-in, and Russian personnel losses are especially high near Pokrovsk—a Donetsk city about a two-hour drive from Sloviansk—thanks to a series of Ukrainian counterattacks. Speaking of which, Ukrainian military chief Oleksandr Syrski claimed in early April that Ukraine had retaken more than 475 square kilometers, mostly in the south, since late January.

This slow tug-of-war over narrow strips of land continues with no end in sight. Repeated ceasefire attempts have failed because each side’s terms remain mutually exclusive. Despite stalling on the battlefield, Moscow still demands Kyiv surrender Donbas territory that Russia’s forces have been unable to seize. Kyiv rightly notes that surrendering the fortress belt without a fight would leave Ukraine defenseless against future attacks—and no one trusts Putin to keep his word.

That is why negotiations keep failing. The Trump administration continues to treat the war like a real estate deal rather than the 21st-century equivalent of asking Czechoslovakia to surrender the Sudetenland to Nazi Germany. Ukraine knows it cannot give up the Donbas without cast-iron security guarantees the Americans are unwilling to provide. Putin, for his part, continues to believe Washington will eventually pull the plug on all support to Kyiv—an intelligence cutoff and a ban on European countries buying American kit for Ukraine—yet the Trump administration has so far refused to take that step.

And so the conflict continues. More lives are spent to satisfy the ego of the autocrat in the Kremlin. Until he changes his mind—or leaves office via a very high window—drones and their operators will keep hunting, missiles will keep flying, and civilians will keep doing their best to carry on as Russia’s spring offensive grinds on into summer.