MORE: ISW is no longer prepared to forecast when Russian forces might seize Donetsk, including the Fortress Belt, since the slowing rate of Russian advances and the challenging nature of the Ukrainian-held terrain in Donetsk makes it unclear that Russia is capable of seizing the territory at all. ⬇️
Russia’s exaggerated territorial ambitions and aggressive territorial demands run completely counter to battlefield reality. Anonymous sources in contact with Putin and additional sources familiar with the matter as well as a Ukrainian intelligence assessment shared with FT indicate that senior Russian commanders have convinced Putin that Russian forces could seize all of Donetsk and Luhansk oblasts by Fall 2026. ISW has observed evidence to assess that Russian forces have only advanced 349.89 square kilometers in Donetsk Oblast since the start of 2026, an advance rate of 2.63 square kilometers per day.
Strong Ukrainian fortifications, the area’s challenging human and physical geography, and Ukrainian counterattacks and mid-range strike campaign that are already inhibiting Russian offensive operations across the theater make the prospects for a Russian seizure of the rest of Donetsk dim.
Russian forces first infiltrated into Kostyantynivka (the Fortress Belt’s southernmost city) in October 2025 and have failed to make any significant tactical gains in the city over the last six months. Ukrainian counterattacks in southern Ukraine since early 2026 have also forced Russia to choose between defending against Ukrainian counterattacks and allocating manpower and resources to priority sectors of the frontline, including the Fortress Belt.
Ukraine’s recent successes are accomplishing tactical, operational, and strategic battlespace effects that undermine Putin’s narrative that the Ukrainian frontlines are on the verge of collapse. Two people involved in back-channel negotiations over ending the war told the FT that Putin’s ambitions are still to control all the Ukrainian territory between Russia and the Dnipro River, and possibly farther into Kyiv City and the port of Odesa, despite Russia’s stalling offensive. Putin’s thinking thus appears to be further and further removed from battlefield realities, likely resulting in the issuance of orders to the Russian military to make gains that it is not capable of making.
Russian Offensive Campaign Assessment, May 13, 2026
The Kremlin is doubling down on its demand that Ukraine withdraw from all of Donbas as a precondition for the resumption of negotiations.
Other Key Takeaways:
Russia’s exaggerated territorial ambitions and aggressive territorial demands run completely counter to battlefield reality.
US President Donald Trump said that he has not agreed with Putin that Russia should acquire all of Donetsk and Luhansk.
Russian courts are increasingly leveraging corruption charges as a pretext to nationalize Russia’s largest corporations, likely setting conditions for the broader nationalization of private assets to support state revenues.
Russian demands for cash reached an all-time high over Victory Day weekend, demonstrating rising societal fears over internet restrictions and tax policy.
Ukrainian forces continue to increase the range and frequency of their long-range drones strikes against Russian oil infrastructure, exploiting overstretched Russian air defenses.
Russian forces conducted large-scale drone strikes overnight on May 12 and throughout the day on May 13, killing at least six people.
The Russian State Duma passed a bill granting the Russian president powers for extraterritorial military operations to protect Russian citizens abroad, previously introduced on March 10.
Ukrainian forces recently advanced in the Slovyansk, Oleksandrivka, and Hulyaipole directions and in the Kostyantynivka-Druzhkivka tactical area.