Why Russia’s Advance in Ukraine Has Slowed to Its Weakest Pace Since 2023

The numbers show a sharp change in momentum

Russia’s rate of advance has been declining since November 2025, according to ISW’s May 2 assessment . The month-by-month figures show how quickly the picture changed in early 2026:

There is an important mapping caveat: the March and April figures cited in the reporting do not count certain Russian infiltration operations or areas where Russian troops may have infiltrated without establishing control . In other words, these numbers measure controlled territory, not every Russian presence behind or near the front line.

Ukraine is contesting the initiative

ISW’s March 31 assessment said Russian advances had slowed as Ukrainian forces continued to contest the initiative in different frontline sectors over a prolonged period . Reporting on the March slowdown also highlighted Ukrainian local counteroffensive actions, including in the southeast, as a key factor .

That matters because even limited counterattacks can disrupt an offensive rhythm. If Russian units must defend recently seized positions, respond to Ukrainian probes, or shift reserves across sectors, they have less freedom to mass forces for follow-on attacks. The result is not necessarily a dramatic Ukrainian breakthrough, but it can be enough to turn Russian pressure into smaller gains—or, in April’s case, a net loss by ISW’s measurement .

Drones are raising the cost of assault

UNN’s report, citing military analysts and front-line tracking data, says Russia’s offensive pace has worsened in part because drones are making Russian operations harder, alongside problems recruiting contract soldiers .

The key point is not that drones alone stopped Russia. It is that a drone-heavy battlefield makes repeated ground assaults more expensive and harder to exploit. When monthly gains are measured in a few dozen square kilometers—or become negative—higher attrition and constant surveillance can sharply reduce the payoff from continued attacks .

Russia is paying heavily for small gains

CSIS described Russia’s war as one of extraordinary costs for minimal gains and estimated that Russian forces had suffered nearly 1.2 million casualties since February 2022 . The same analysis said that after Russia seized the initiative in 2024, its most prominent offensives advanced at an average pace of only 15 to 70 meters per day .

That attrition picture helps explain why recruiting matters. UNN reported that Russia is struggling to recruit enough contract soldiers, which weakens its ability to sustain the high-casualty tempo that produced limited gains in 2024 and 2025 . Russia may still be able to keep attacking, but the available data suggest those attacks are producing diminishing territorial returns .

Strikes and communications pressure are adding friction

ISW identified several additional factors behind the declining Russian rate of advance since late 2025: Ukrainian ground counterattacks, Ukrainian mid-range strikes, the February 2026 block on Russia’s use of Starlink terminals in Ukraine, and Kremlin efforts to throttle Telegram . ISW’s March 31 assessment similarly said Ukrainian counterattacks and mid-range strikes, along with those communications pressures, had exacerbated existing Russian military problems .

Those factors do not need to destroy Russian formations outright to matter. They can make it harder to coordinate attacks, concentrate forces, move supplies, and turn local pressure into wider operational gains. That helps explain why Russia can still launch assaults while failing to convert them into rapid advances .

What it means for the Donbas fight

The slowdown undermines the idea that Russia is close to quickly seizing the entire Donbas. UNN, citing military analysts and front-line tracking data, reported that the Russian army is currently unable to rapidly capture the whole region .

That does not mean Ukraine is guaranteed to retake large areas soon. It means the battlefield evidence available in these reports points to a grinding, costly offensive rather than a fast Russian breakthrough. The strongest conclusion is narrow but significant: by early spring 2026, Russia’s offensive was producing far less territory for the cost, and in April it produced a net loss by ISW’s measurement .

The caveat: a slowdown is not a final outcome

The available sources do not prove the slowdown is permanent. Monthly front-line data can change, and ISW’s territorial counts include explicit caveats about infiltration and control .

Still, the current pattern is clear: Russia’s advance has slowed because Ukraine is contesting the initiative more effectively while Russian forces face drones, counterattacks, strikes, recruitment strain, and operational friction. Russia remains capable of attacking, but recent data show an offensive with diminishing returns—not a rapid march across Ukraine .