Russian forces have gained ground on the eastern approaches to Sloviansk and continue to prioritize an eastern route toward the city, according to the Institute for the Study of War (ISW). Their earlier push from the northeast had bogged down, and Russia now aims to set up a future assault on one of the last major cities Ukraine still holds in Donetsk Oblast. A quick move on the city itself remains extremely unlikely, ISW said.

Russia's 2026 summer campaign in the east has advanced through field edges and small villages rather than the breakthroughs the Kremlin keeps promising, the grinding pattern that has defined the fighting across Donetsk Oblast for years.

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The eastern approach

Ukrainian military observer Kostiantyn Mashovets reported that Russian forward units are advancing across several tactical areas at once in the Sloviansk direction. He said the command of Russia's 3rd Combined Arms Army rushes assault infantry forward right after each successful infiltration. Russian troops reached the southeastern edge of Pyskunivka, east of Sloviansk, from the east and northeast, moving off positions they had seized on the southern bank of the Siverskyi Donets, Mashovets said. Zakitne lies northeast of Pyskunivka and Kryva Luka southeast of it, and ISW read the advance as evidence Russia has consolidated positions in both.

They also infiltrated the southern and southeastern outskirts of Mykolaivka from western Rai-Oleksandrivka. ISW assessed that Russia is running a dual effort to connect its units near Kryva Luka with those at Rai-Oleksandrivka, so it can assault Mykolaivka from dominant terrain to the east and south at once. Mashovets added that other Russian groups slipped through three settlements along the E-40 Bakhmut-Sloviansk highway, trying to hold the western bank of the Siverskyi Donets-Donbas Canal and reach the river just east of the city.

ISW observed reports on 23 August that Ukrainian forces repelled a Russian infiltration attempt in Mykolaivka.

Oleksandr Borodin, spokesperson for Ukraine's 3rd Army Corps, said the Lyman direction falls in his corps' zone and that Russia's goal there is to half-encircle the Sloviansk-Kramatorsk agglomeration from the flank—first securing bridgeheads across the rivers, then cutting logistics. He called those plans unrealistic:

"We have quite serious defensive positions there and have been preparing for a long time. The capabilities they currently have to try to accomplish this task are insufficient even to come close to achieving such a goal."

Why Moscow switched directions

Russia prioritized attacking Sloviansk from the northeast through Lyman when it opened its spring-summer 2026 offensive, but that effort has largely stalled. The Siverskyi Donets River, which loops north and northeast of the city, together with a web of canals, handed Ukrainian defenders a natural moat. So Russian commanders now treat Mykolaivka as a key prize. Taking it would let them strike west toward Sloviansk from the east, skirting the water obstacles that blocked the northeastern route.

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A slow road into the Fortress Belt

Sloviansk anchors the northern end of Ukraine's Fortress Belt, a chain of fortified cities that has blunted Russian advances in Donetsk Oblast since 2014. ISW cautioned that Russian forces are extremely unlikely to make fast gains west of Mykolaivka, since they still need to seize several more settlements first.

Ukraine's President Volodymyr Zelenskyy said on 23 August that Putin has ordered his army to seize all of Donetsk Oblast by 31 December. By ISW's count, it is the 15th such deadline since 2022, and Russia has missed every one that has come due.

Zelenskyy put Russia's frontline casualties this year at around 267,000, including about 155,000 killed, and said 70% to 80% of them fall in the Kostiantynivka direction. Russia holds about 79.89% of Donetsk Oblast, by ISW's count, and Zelenskyy said the Kremlin is preparing to mobilize around 300,000 men after the 18–20 September State Duma elections, partly to reinforce Donetsk and Luhansk oblasts.

Logistical problems are stopping Russian small infantry groups from reaching Lyman, a 53rd Brigade officer told Army TV on 21 August, ArmyInform reported.

Russia is trying to capture Lyman and use it as a launchpad for an advance toward Sloviansk and Kramatorsk. Its forces have repeatedly tried to push into the city. They have reached its eastern edge but have not secured a foothold inside, according to Ukraine’s Joint Forces.

Junior Lieutenant Volodymyr Hirniak, a communications officer with Ukraine’s 53rd Separate Mechanized Brigade, said the situation in the unit’s sector remained tense but had “not changed too radically.”

Russian forces continued to use drones, including fiber-optic models, Hirniak said. On the ground, they were sending small infantry groups to slip through Ukrainian lines and create confusion inside the brigade’s defensive positions.

The tactic was neither new nor confined to the 53rd Brigade’s sector, he added. Russia’s immediate aim was to reach Lyman and “open a gate” for further advances.

However, logistical problems were preventing the groups from achieving that aim, according to Hirniak. Ukrainian troops later detected and neutralized the infiltrating teams, he said.

ArmyInform did not report how many groups had attempted to advance, where within the brigade’s sector the incidents occurred, or over what period. Hirniak’s account could not be independently verified.

Why Russia keeps pushing toward Lyman

Lyman is a frontline city in northern Donetsk Oblast that blocks Russia’s northern route toward Sloviansk and Kramatorsk, part of Ukraine’s fortified Donbas “fortress belt.” Russia occupied the city for about four months in 2022 before Ukrainian forces liberated it on 1 October.

Joint Forces spokesman Viktor Trehubov said on 4 August that Russia needed to capture Lyman and establish a base there before advancing south toward Sloviansk and Kramatorsk.

Russia has pressed towards Lyman for more than a year. In July 2025, another Ukrainian officer said Russian gains near the city remained slow and costly despite repeated attempts to exploit gaps in Ukrainian lines.

A Ukrainian court sentenced the former chief engineer of Lyman’s locomotive depot to 15 years in prison with property confiscation for helping Russia target the frontline city, Ukraine’s Security Service (SBU) said on 11 August. Investigators report he sent a Russian handler the locations of Ukrainian positions intended for guided-bomb and artillery strikes.

Lyman blocks Russia’s northern route toward Sloviansk and Kramatorsk, which are part of Ukraine's fortress belt in the Donbas. As attacks on supply lines intensify, information about Ukrainian positions can help Russia direct bombs and artillery. The case fits a broader pattern of Russian intelligence recruiting people inside Ukraine to locate targets. Russian services have used money and blackmail, including threats against recruits’ families, to secure their cooperation.

According to the SBU, the former engineer traveled around Lyman and its outskirts to record Ukrainian military bases. He marked possible targets on Google Maps, then sent screenshots to a handler in Russia through a messaging app.

The collaborator operated from basement

The agency said an acquaintance whom it described as a “DNR deputy” in occupied Donetsk Oblast connected him with Russian intelligence. The SBU said the man moved into an apartment building’s basement to shelter himself while directing Russian strikes on the community.

SBU officers detained him in Sloviansk in May 2026. The agency said a seized smartphone contained evidence of his reconnaissance and contacts with the Russian side.

The SBU did not identify the man, the court, or any specific strike enabled by his information.

How Russia turns locals into spotters 

The Lyman case involved an acquaintance of the former engineer, but Russian services also use money, blackmail, and online platforms to find recruits. The SBU says minors may initially receive simple assignments, such as taking photographs or painting graffiti, before being directed toward more serious sabotage.

Other recruits have allegedly answered Telegram offers of “easy money.” These include a Zaporizhzhia man later convicted of building bombs and a Dnipro suspect accused of activating more than 1,000 Starlink terminals for Russian forces.

Ukraine has prosecuted similar cases before. In November 2024, a court sentenced another Russian agent to 15 years for guiding missile and drone strikes in Zhytomyr Oblast.

More recent cases remain at the allegation stage. The SBU has accused a Kharkiv Oblast man of installing hidden cameras near military sites and a Poltava student of mapping energy facilities while filming air-defense units.