For years, Russian troops probed the Ukrainian garrison at Mykolaivka in eastern Ukraine's Donetsk Oblast, sending in small teams of infiltrators for the defenders to hunt down. On 29 July, they stopped probing. "The Russians have begun an assault on Mykolaivka from the east," observer Thorkill reported, citing the local Ukrainian Telegram channel nikolaevka_online.

Russian assault groups are attacking the apartment blocks along the town's eastern edge. Mykolaivka sits 8 km east of Sloviansk, one of just two big free cities in Donetsk Oblast, and taking it is the precondition for any Russian siege of the city. "The situation is deteriorating," nikolaevka_online warned.

Mykolaivka is "the eastern gateway to Sloviansk," according to mapper Clément Molin. The Russian offensive in Donetsk aims to lay siege to and ultimately capture Sloviansk and neighboring Kramatorsk, which together are still home to nearly 100,000 people despite hundreds of thousands of others having fled.

A Ukrainian garrison anchored by the 81st Airmobile Brigade has defended Mykolaivka for years. But the garrison has been struggling to interdict every team of Russian infiltrators—and now the infiltrators have company.

The sector is an exception to a mostly frozen front. Russian troops captured 106 square km of Ukrainian territory in July, according to the Blackbird Group—the fastest Russian advance since January, but a fifth of what the Russians seized in July 2025. Blackbird reads the figure as evidence Russia has largely exhausted its offensive options; in June, Russian forces lost 9 square km on net. The slow average along the 1,200 km gray zone belies much faster movement in a handful of sectors, and east of Sloviansk is one of them.

Expect a long, hard fight in and around the ruins of Mykolaivka. "It is highly unlikely that the battle for Sloviansk will begin this year, not least because the fighting in Mykolaivka is likely to be prolonged," Molin explained.

Tough terrain

The geography is difficult for both the defenders and the attackers. The Donets Canal, which abuts Mykolaivka on the west, "aids the Ukrainian defense just as much as it facilitates the Russian offensive," Molin noted. To reinforce the 81st Airmobile Brigade in and around Mykolaivka, Ukrainian troops must cross the canal while under Russian fire. "Massing troops there is a highly complex undertaking," Molin warned.

But the Russian army will face the same challenge if and when it marches through Mykolaivka. "Crossing the canal, particularly around the Sloviansk power plant and its network of waterways, will come at a very high cost, especially given the extensive fortifications the Ukrainians have built in the area over recent months," according to Molin.

In other words, the 81st Airmobile Brigade has fallback positions on the near side of the Donets Canal. If the brigade can't hold Mykolaivka, maybe it can hold the canal—and delay if not halt further Russian advances toward Sloviansk.

The Ukrainians would prefer to hold in Mykolaivka, of course. But it's looking increasingly dire. The Russians appear to be accumulating in the seasonal homes, or "dachas," on the northeastern outskirts of Mykolaivka. "It is difficult to say at this point how many Russian soldiers have infiltrated there," Thorkill wrote. "However, their very presence has forced the command of the 81st Air Assault Brigade—responsible for the city's defense—to secure with patrols."

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The Ukrainian brigade is trying to build a wall of infantry and drones between the dachas and a key road intersection that can carry defenders and attackers across central Mykolaivka.

But the 81st Airmobile Brigade is outnumbered, probably badly so. For the first two years of the wider war, the brigade could count on help from the 54th Mechanized Brigade, which clung to the 81st Airmobile Brigade's right flank.

While the 54th Mechanized Brigade still registers on many maps of the gray zone, in fact it's barely there. "Various snippets of information indicate that the 54th Mechanized Brigade—longtime right-flank neighbor of the 81st Brigade—was completely withdrawn from the front between June and July 2024 and sent to the deep rear," Thorkill wrote. East of Sloviansk, "only its drone group remained."

"The unit had long been a brigade in name only," Thorkill noted. So the 81st Airmobile Brigade fights mostly alone, for now—defending the gateway to Sloviansk.

Russia's escalating strikes made July the deadliest month for Ukrainian civilians in more than three years. More civilians were killed in Ukraine in July than in any month since April 2022, driven by intensified Russian attacks using ballistic missiles and long-range drones, the UN human rights office in Ukraine reports.

The record is the human cost of a shortage of interceptors for ballistic missiles amid the US war with Iran. However, Ukrainian President Volodymyr Zelenskyy has said the cut in interceptor supplies from partners may be a political attempt to make Ukraine more compliant, a claim he made after the same overnight attack that killed at least 17 civilians, mainly in Kyiv and the surrounding region.

The month's toll came from strikes on cities

The July deaths clustered around attacks on populated areas. Beyond the Kyiv strike, air and drone attacks hit Kramatorsk, Kherson, and Zaporizhzhia, killing and wounding dozens and destroying homes, schools, public transport, water systems, and humanitarian warehouses, according to the UN.

The targets read as the fabric of civilian life. Water systems, schools, and aid depots are not military objects, and their destruction alongside the deaths is what the UN monitoring mission records when it documents the effect of Russia's long-range strikes on the civilian population.

The half-year figures show a steep climb

The July record sits atop a sharply rising trend. In the first half of 2026, the UN monitoring mission confirmed 1,396 Ukrainian civilians killed and 7,978 wounded.

Those numbers are climbing fast. The first-half toll is 37% higher than the same period in 2025 and 114% higher than the year before, as Russia intensifies its long-range strikes. Civilian deaths have more than doubled in two years, a direct measure of what the shift to massed ballistic and jet-powered drone attacks has done to the people beneath them.

Russia reported its own civilian deaths

The UN also noted casualties on the Russian side. According to Russian local authorities, Ukrainian long-range drone retaliation strikes on several Russian cities this week reportedly killed at least 12 people.

The scale is asymmetric and the cause singular: it is Russia's war on Ukraine, and its intensifying strikes on Ukrainian cities, that made July the deadliest month for civilians since the war's first spring.

A doomed Russian tank assault on 22 July along the southern approaches to the twin cities of Kramatorsk and Sloviansk, the last big free cities in eastern Ukraine’s Donetsk Oblast, was ultimately a sideshow. The Russians’ main effort, in their long and bloody campaign to capture all of Donetsk, is playing out in the north, not the south. 

The front northeast of Sloviansk “has been the most successful for the Russian army throughout 2026,” mapper Clément Molin noted. 

The bad news for Ukraine is that its forces in the area—parts of six brigades including the 53rd, 54th and 63rd Mechanized Brigades and the 81st Air Mobile Brigade and the 117th and 120th Territorial Defense Brigades—are “insufficient,” according to Molin. 

Worse, relentless Russian bombardment of the roads and paths leading to and through Sloviansk means the Ukrainians may struggle to sustain any additional brigades in the area. Assuming there are any free brigades, of course.

The bombardment is intensifying. On 31 July, a Russian warplane struck the Sloviansk Chemical Plant, deep inside the city, with a 1,500-kg KAB-1500 precision glide bomb. “The city has come under increasingly heavy attacks in recent days,” AMK Mapping noted.

But the same difficult terrain, crisscrossed by the Donets Canal and dense Ukrainian fortifications, complicates Russian attacks. There are few protected approaches toward Sloviansk from the Russians’ main bases in the ruins of Siversk, 31 km to the east. And one big town town stands between the Russians and the free city: Mykolaivka.

And the Ukrainians are bombarding Russian supply lines with the same intensity that the Russians are bombarding Ukrainian supply line. It’s for those reasons that Molin expects the Russians to eventually lay siege to Sloviansk and neighboring Kramatorsk from the northeast.

But not anytime soon. “It is highly unlikely that the battle for Sloviansk will begin this year, not least because the fighting in Mykolaivka is likely to be prolonged,” Molin predicted.

Crawling advance

The slow pace of the Russian advance belies the worsening conditions in Sloviansk and Kramatorsk. Out of a combined pre-war population of around 440,000, just 90,000 people remain in the twin cities. The other 350,000 have fled.  

As the cities slowly empty, all eyes turn to the tiny village of Rai-Oleksandrivka, 14 km east of Sloviansk. “This small village, seemingly insignificant at first glance, is actually of strategic importance, as the surrounding high ground overlooks the city of Sloviansk,” Molin explained. 

“In recent weeks, Russian forces have been consolidating their hold on the village and the surrounding heights, even though Ukrainian troops still maintain positions in many areas,” Molin wrote. 

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Russian forces are already relentlessly bombarding Ukrainian supply lines in the area with air-launched glide bombs. As Russian ground forces advance closer to Sloviansk and consolidate along key heights such as those around Rai-Oleksandrivka, they can begin aiming more tube artillery at the same supply lines, compounding the Ukrainians’ logistical problems. 

The coming battle is neither won nor lost yet. But time is running out for Ukrainian forces to reset the battlefield in their favor. 

If the Ukrainian command can prioritize the front, and push enough supplies to front-line positions, it might yet save Sloviansk and Kramatorsk. As Ukrainian Pres. Volodymyr Zelensky completes his reshuffle of key civilian and military leaders and a new command, that command’s attention “must shift to the Donbas,” Molin stressed.