The Ukrainian counteroffensive in northern Donbas has halted Russian attempts to encircle remaining Ukrainian-held cities, pushing back forces by dozens of square miles despite a broader war of attrition, dnes.bg reported. Russian President Vladimir Putin has repeatedly stated that the fall of the eastern Ukrainian region is inevitable and will happen faster than Kyiv assumes.
Operation Vivaldi Halts Russian Advance in Northern Donbas
The ongoing multi-month Ukrainian counteroffensive in northern Donbas, designated by Kyiv as Operation Vivaldi, has frustrated Russian efforts to secure the region. Western analysts estimate that Russia lost dozens of square miles of territory during the campaign, according to The New York Times. Despite these gains, it took Ukraine months of preparation to reclaim a small fraction of lost ground.
Before launching offensive operations, Ukrainian forces had to stabilize their defensive lines to halt the slow Russian creep across northern Donbas. Kyiv targeted Russian logistics by striking mid-range supply routes, roads, and railway lines used to transport troops and equipment.
Fierce Fighting Persists Across Southern Donbas Strongholds
In southern Donbas, Russian forces continue fierce attacks to break through Ukrainian lines and encircle major cities, maintaining daily assaults involving hundreds of troops. Last year’s Russian breakthrough saw forces pierce Ukrainian defenses around Pokrovsk and advance west toward Dobropylie. Although Russian forces captured Pokrovsk earlier this year, Ukrainian defenders ultimately stabilized their lines and halted the push toward the fortress belt of Sloviansk and Kramatorsk. Lieutenant Colonel Kyrylo Dubrovskyi, a commander from the 1st Azov Corps of the National Guard of Ukraine who leads defense operations in the sector, stated that the Delta digital battlefield management system stopped the advance by enabling real-time information sharing and the neutralization of enemy storm groups.
Contrasting Territorial Gains and Airstrikes on Ukrainian Cities
Russia’s overall pace of advancement slowed significantly through 2026 compared to the previous year. Data from the Finland-based research company Black Bird Group indicates that September was the weakest month for Russian net territorial gains in Ukraine since June 2023. Western researchers generally agree that Russia gained barely more territory this year than it lost, contrasting sharply with the Russian Ministry of Defence’s September 19 claim that forces had seized over 2,000 square miles. Ultra-nationalist Russian military bloggers have also expressed skepticism regarding the failure to encircle the Donbas fortress cities.
Because its territorial goals in Donbas remain unmet, Moscow has intensified its aerial campaign against Ukrainian urban centers, using missile and drone advantages to bombard Kyiv and other cities. Overnight airstrikes across multiple cities killed at least 20 people, according to Ukrainian officials who denounced the bombings as a terrorist campaign aimed at breaking national resistance. President Volodymyr Zelenskyy asserted that over 5,000 Russian soldiers have died and 250 have been captured during the counteroffensive, figures that The New York Times could not independently verify, while Ukraine maintains a policy of not disclosing its own casualties.
What Is Operation Vivaldi and the Delta System?
What is Operation Vivaldi?
Operation Vivaldi is the name given by Kyiv to the multi-month Ukrainian counteroffensive in northern Donbas. The operation successfully halted Russian encirclement efforts and pushed back forces across dozens of square miles using targeted logistical strikes and armored assaults.
What role does the Delta system play in the conflict?
The Delta system is a digital battlefield management software utilized by Ukrainian forces in southern Donbas. According to Lieutenant Colonel Kyrylo Dubrovskyi, the tool allows units to organize real-time information sharing and effectively detect and neutralize enemy storm groups.
How have drones changed armored vehicle tactics on the front lines?
Massive drone surveillance previously reduced the use of armored vehicles due to their high vulnerability on the battlefield. Ukrainian forces have adapted by outfitting armored units with reinforced reactive armor designed to use controlled explosions to repel incoming drones during bunker-clearing operations.
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