Russian forces have reportedly made significant advances in the eastern Ukrainian city of Kostiantynivka, a strategic location in the Donetsk region, as Ukraine undergoes notable changes in its defence and military leadership. The developments come amid intensified fighting and shifting control in one of the conflict’s most contested areas.
Russian Infiltration of Kostiantynivka
Kostiantynivka, described by Russian President Vladimir Putin as the “key to liberating the entire territory of the Donetsk People’s Republic,” has become a focal point in the ongoing conflict. Ukrainian soldiers on the ground have indicated that Russian forces are effectively cutting off the city, with some suggesting that much of it may already be under Russian control.
One Ukrainian soldier told the news outlet Hromadske, “Things are very bad in Kostiantynivka. It’s not a question of whether we’ll lose it or not – we’ve effectively already lost it.” Reports indicate that Russian troops are advancing into nearby villages such as Molocharka and Izhevka, raising concerns that Ukrainian units could become encircled within the next month or two without reinforcements or changes in defensive tactics.
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Despite these challenges, some Ukrainian commanders maintain a more optimistic stance. The commander of a unit known as Kurt and Company stated that while heavy fighting continues throughout the city, Ukrainian forces still control most of Kostiantynivka, with Russian troops primarily positioned on the flanks. However, the commander highlighted the significant threat posed by Russian aerial bombs, specifically KABs—large aerial ordnance weighing between 500kg and 3,000kg—that have been deployed in large numbers against Ukrainian positions.
Leadership Changes in Ukraine’s Defence Forces
Amid the intensifying conflict, Ukraine has made unprecedented changes to its military leadership. Within a single week, both Defence Minister Mykhailo Fedorov and Commander-in-Chief Oleksandr Syrskii were dismissed. These shifts reflect the Ukrainian government’s response to the evolving battlefield situation and the need for renewed strategic direction.
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Before his dismissal on July 21, Syrskii had offered a more hopeful assessment of the situation in Kostiantynivka, estimating that around 145 Russian infiltrators were present in the city but were suffering significant losses, with about 25 casualties daily due to Ukrainian drone operations targeting enemy positions.
Russian Offensive Efforts and Ukrainian Resistance
While Russian territorial gains have slowed overall, recent intelligence suggests an increase in Russian offensive activity. The Institute for the Study of War (ISW) noted that Russian forces captured territory at a rate of 16.6 square kilometers per day in early 2025, which dropped to just 1 square kilometer per day in June. In July, Russia reportedly lost territory at a rate of 1.6 square kilometers daily.
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However, Robert Brovdi, commander of Ukraine’s Unmanned Systems Forces, indicated that the number of Russian personnel involved in frontline offensive operations rose by 12 percent compared to June and 18 percent compared to May, with casualties increasing proportionally.
In northern regions such as Kharkiv and Sumy, Russia claimed to have destroyed Ukrainian unmanned aerial vehicle (UAV) control centers and to have captured several settlements, though these claims have not been independently verified and were denied by Ukrainian officials.
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Broader Conflict Dynamics and Strategic Strikes
Ukrainian President Volodymyr Zelenskyy revealed intelligence indicating that Russia is preparing an expanded mobilisation to replenish its forces, aiming to raise between 300,000 and 500,000 troops by early October. This follows heavy Russian casualties estimated at 225,000 this year. Zelenskyy also noted the presence of North Korean troops in Russia, with 3,000 soldiers already deployed in 2024 and an additional 30,000 reportedly being prepared for deployment.
On the strategic front, Ukraine has conducted long-range strikes targeting Russian economic and military infrastructure. Attacks have hit oil refineries, fuel depots, and military production facilities deep inside Russian territory, including Bashkortostan and Rostov-on-Don. These strikes have significantly disrupted Russian fuel supplies, with Ukraine claiming to have disabled nearly half of Russia’s refining capacity this year.
Ukrainian forces have also targeted electricity infrastructure and supply lines in Crimea and other occupied areas, aiming to weaken Russian military capabilities. Meanwhile, Russia continues to launch drone and missile attacks on Ukrainian cities, causing civilian casualties and widespread damage.
Implications for the Conflict
The infiltration of Kostiantynivka marks a critical moment in the eastern Ukraine conflict, as control over this city could influence the broader battle for the Donetsk region. The leadership changes in Ukraine’s defence ministry and armed forces underscore the high stakes and urgency faced by Kyiv in responding to Russian advances.
Both sides appear to be escalating their efforts, with Russia attempting to regain momentum through increased troop deployments and tactical adaptations, while Ukraine leverages drone technology and long-range strikes to counter Russian advances and disrupt supply chains.
The coming months are likely to be decisive, with the potential for intensified fighting as Russia seeks to consolidate gains and Ukraine strives to defend key territories and maintain its military resilience.
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