Beyond Donbas: Why the Fate of Ukraine’s Army Could Shape the Road to Odesa

The battle for eastern Ukraine may have consequences far beyond the cities being contested. Read together, Russian military commentaries suggest a broader strategic possibility: the destruction of Ukrainian formations in Donbas could undermine the defensive lines behind them, shift the struggle towards the Dnieper and eventually open an approach to Odesa from the north. The connecting question is how much of Ukraine’s army would survive to defend each successive position.

The war in Ukraine may ultimately be decided not by the capture of a city, but by the destruction of the army defending it.

Across the industrial landscape of Donbas, Russian forces are attempting to overcome a Ukrainian defensive system strengthened and fought over for more than a decade. Sloviansk, Kramatorsk, Druzhkivka and Kostiantynivka form a belt of towns, factories, transport links and prepared positions whose military importance extends far beyond their boundaries.

The larger Russian objective may be to exhaust and isolate the formations defending this belt, depriving Ukraine of the experienced soldiers and military organisation needed to establish an equally effective front farther west. Under that interpretation, the capture of the cities would be one stage in a campaign directed at the army itself.

The consequences could extend through the newer defensive works around Pavlohrad to the Dnieper and, eventually, the Black Sea. If Ukraine’s surviving forces could no longer hold successive positions, Russian troops might gain the opportunity to cross the river and approach Odesa from the north.

No public evidence establishes that Moscow has approved this sequence as an operational plan. Its individual elements, however, have appeared in Russian military commentary with considerable specificity.

Those assessments describe different parts of a larger strategic picture: the fortifications Ukraine is building, the manpower required to defend them, the river barriers beyond them and the possible approaches to Odesa. Read together, they offer a way of understanding why the fate of Ukraine’s eastern army could matter more than the fate of any single city.

The army behind the fortress belt

The Sloviansk–Kramatorsk defensive belt draws its strength from the relationship between terrain, preparation and experienced troops.

Factories and industrial estates provide substantial structures around which to organise resistance. Residential districts restrict the movement of armoured vehicles. Roads, railways and surrounding settlements connect successive defensive positions, while drones and artillery make the approaches dangerous for an attacking force.

Ukraine has considerable experience of fighting in this environment. Its defenders can exploit a landscape in which even a relatively small force, properly supplied and supported, can make an advance costly.

But the strategic outcome would depend on what happened to those defenders.

A withdrawal conducted in good order could surrender territory while preserving much of the army’s fighting strength. Units could regroup, receive replacements and occupy another line. A retreat undertaken after formations had been deprived of supplies, fragmented or severely depleted would leave Ukraine facing a different problem.

It would have lost experienced infantry, officers, engineers, artillery crews and drone operators, together with the relationships and routines that allow them to fight as an organised force.

A trench can be dug in weeks. A new defensive belt can be constructed over months. An experienced field army cannot be recreated so easily.

The Russian campaign may therefore be understood as an attempt to turn territorial pressure into a lasting reduction in Ukrainian military capacity. Threatening roads, disrupting supplies and forcing Ukraine to commit reserves would serve that purpose even before the principal cities fell.

Pressure from the north belongs within this wider picture. Fighting around Kupiansk and the Oskil River is geographically distinct from operations around Lyman and the approaches to Sloviansk. These should not be mistaken for a single continuous breakthrough. Nevertheless, simultaneous threats across several sectors can complicate reinforcement and require Kyiv to distribute scarce reserves.

Russian military analyst Vasily Dandykin has described pressure towards the Sloviansk–Kramatorsk urban cluster from the Lyman and Kostiantynivka directions as potentially creating conditions for operations from both north and south. The underlying logic is to make the fortress belt progressively harder to sustain, reducing the need to capture every position through a frontal assault.

That process remains contested. In reporting published on 12 and 13 November, French open-source military analyst Clément Molin described a stabilisation of the Ukrainian front east of Sloviansk following reinforcements and changes in command. Ukrainian forces reportedly regained positions around Lyman and Yampil, improving their ability to threaten advancing Russian groups.

Molin distinguished that improvement from the more difficult position around Kramatorsk, where Russian drones, artillery and guided bombs continued to threaten transport routes and crossings.

The significance of this reporting is immediate: Ukraine can still reinforce threatened sectors and restore positions. The question is whether it can sustain that effort while preserving enough strength for the battles beyond them.

Sumy and Kharkiv: the contest for Ukraine’s reserves

The forces available for that struggle are also being contested hundreds of kilometres away, on the Sumy and Kharkiv fronts.

Russian commentators have explicitly connected these northern operations to the battle for Donbas. In an interview with NEWS.ru on 20 August 2026, Dandykin identified Sloviansk and Kramatorsk as the main Russian direction, while describing pressure towards Kharkiv and Zaporizhzhia as a means of dispersing Ukrainian reserves. He also claimed that Ukrainian reinforcements were being transferred from Donbas to Sumy.

The military logic does not require the immediate capture of either northern city. A credible threat can oblige Ukraine to retain formations that might otherwise reinforce the eastern army, relieve exhausted units or prepare positions farther west.

Boris Rozhin, the commentator associated with ColonelCassad, explained this calculation in an interview with Ukraina.ru on 22 December 2025. If Ukraine withheld reinforcements from Sumy, he argued, Russia could exploit the weakness and take more ground. If Ukraine sent them, the Northern Grouping would have served a wider purpose by tying down forces and helping Russian operations elsewhere. He also emphasised the threat to communications between Sumy and Kharkiv.

The relationship can work in the opposite direction. In remarks reported by Vzglyad on 1 October 2026, citing TASS, Andrei Marochko claimed that Ukraine’s strongest formations were concentrated around Sloviansk and Kramatorsk, while less prepared units were being sent to Sumy. His account suggests a command trying to protect its main eastern concentration while accepting greater risks in the north.

These are Russian assessments of Ukrainian deployments, not independently verified force totals. Taken together, however, they describe the same strategic dilemma: reinforcing one threatened sector can expose another.

Geography gives the fronts different roles. Sumy bears on the wider allocation of Ukraine’s army. Northern Kharkiv adds another major area that Kyiv must defend. Farther east, the Kupiansk–Oskil sector has a closer geographical relationship with the struggle around Lyman and the northern approaches to Donbas. Their connection is a combination of pressure on reserves and communications, rather than a single continuous encirclement.

The implications extend beyond the immediate battle. If formations remain committed around Sumy and Kharkiv, fewer may be available to receive and reinforce troops withdrawing from Donbas. The army reaching Pavlohrad could consequently face a shortage of fresh support as well as the accumulated losses of its own campaign.

On this reading, the northern fronts help explain how a battle for the Donbas army could become a struggle over Ukraine’s ability to rebuild a front behind it.

What survives to defend Pavlohrad?

One of the most revealing Russian accounts of Ukraine’s preparations acknowledges that a substantial defensive system is already taking shape behind Donbas.

Writing in Voennoye Obozreniye on 7 May 2026, Oleg Myndar examined fortification work undertaken during the first four months of the year. He described extensive construction across an arc stretching from Zaporizhzhia towards the northern flanks of Donbas, with particular attention to the Sloviansk–Kramatorsk belt and Pavlohrad.

His account contradicts any suggestion that Ukraine has simply neglected the territory behind its existing front. It points instead to preparations for a prolonged defence through successive positions.

Pavlohrad matters because it connects central Ukraine with the eastern battlefield. Situated in Dnipropetrovsk oblast, west of the Donbas fortress cities and east of the Dnieper, it is an important centre for the movement of supplies, equipment and reinforcements. An advance threatening the city would put pressure on both a defensive position and the transport system supporting the wider front.

The newer fortifications also represent a different defensive environment. In Donbas, Ukrainian troops can exploit a dense industrial landscape. Farther west, more of their protection must be created through engineering: trenches, dugouts, anti-tank ditches, concrete obstacles, wire and strongpoints supported by mines, artillery and drones.

Such positions need not form an uninterrupted wall. Gaps can be covered by surveillance and fire, while reserves move against a penetration. But a defence organised in this way depends on troops being available to hold its strongpoints, reinforce threatened sectors and keep the system supplied.

That was the central weakness identified by Myndar. Even extensive fortifications would be ineffective without adequate personnel, ammunition and reserves.

The crucial question at Pavlohrad would therefore be the condition of the army arriving there.

Cohesive formations withdrawing with their equipment and command structures intact could use the prepared positions to regroup and impose another prolonged battle. Units arriving exhausted, understrength and short of ammunition would have far less capacity to exploit the same works.

The distinction connects the fighting in Donbas to Moscow’s emphasis on Ukrainian manpower.

On 4 June 2026, Vladimir Putin claimed that Ukraine was suffering approximately 40,000 personnel losses each month. According to figures reported by the Russian newspaper RBC, he put monthly mobilisation at about 15,000 to 16,000, with another 14,000 wounded personnel returning from hospitals. He argued that Ukraine’s armed forces were consequently shrinking by roughly 10,000 personnel a month.

These are Russian presidential assertions, not independently verified Ukrainian military statistics. “Losses” does not mean deaths alone; it can encompass wounded, missing, captured and other personnel unavailable for duty. Putin’s separate claim of approximately 20,000 monthly desertions cannot simply be added to the total without establishing whether the categories overlap.

The figures nevertheless reveal the logic Moscow publicly assigns to the campaign: Ukrainian fighting strength is being consumed faster than it can be restored.

If that assessment is broadly correct, the pressure would extend beyond the replacement of individual casualties. An army with too few available troops must shorten its front, weaken the density of its positions or draw reinforcements from other sectors. Each response can create another vulnerability.

Nor are replacements interchangeable. New recruits may restore a unit’s numerical strength without immediately restoring its effectiveness. The loss of experienced commanders and specialists can impair a formation long after its vacancies have been filled.

Pavlohrad would test the cumulative effect of that process. Ukraine may have built the physical foundations for another defensive campaign. Whether it could fight that campaign with sufficient strength would depend heavily on what it had preserved in Donbas.

The river beyond the second line

Beyond Pavlohrad lies the Dnieper, a major defensive barrier and a central feature of Ukraine’s transport geography.

Its bridges connect the country’s eastern and western regions. Disrupting them can complicate the movement of military supplies and reinforcements, while damage to their roadways or approaches can temporarily prevent heavy vehicles from crossing without destroying the entire structure.

The military value of such attacks depends on their lasting effect. A damaged crossing that can be repaired quickly presents a different problem from one repeatedly put out of use. Alternative routes, repair capacity and the ability to protect traffic all matter.

The geography also sets limits on what bridge disruption alone could achieve. The Dnieper lies well west of the Donbas fortress belt. Ukrainian forces withdrawing from Kramatorsk could occupy successive positions east of the river before they needed to cross it. Attacks on Dnieper bridges would not, by themselves, encircle those forces.

They could, however, contribute to a wider campaign against the communications sustaining the eastern army. Combined with pressure on roads, railways and supply centres closer to the front, disruption at the river could make reinforcement and eventual withdrawal more difficult.

If the Ukrainian defence were pushed back to the Dnieper, the river would provide an opportunity to stabilise the front. Russian forces would then have to do more than put troops on the opposite bank. They would need to establish and protect crossings capable of sustaining a substantial force, including its equipment, ammunition and fuel.

For the wider hypothesis, the condition of the Ukrainian army would again be decisive. A river defended by cohesive formations with adequate reserves presents a different military problem from one held by scattered units recovering from a major defeat.

A sustained Russian presence west of the Dnieper would change the geographical scope of the war. It is from that point that some Russian commentators begin to consider a campaign towards Odesa.

Zaporizhzhia: the city at the river

A parallel struggle is unfolding farther south, on the approaches to Zaporizhzhia city. Its importance lies in its industrial and transport infrastructure and its position across the Dnieper, with crossings connecting the two banks through the area around Khortytsia.

Russian commentary describes several approaches towards the city, rather than one uninterrupted thrust. In an assessment reported by PolitNavigator on 7 November, war correspondent Pavel Kukushkin discussed renewed Russian efforts around Stepnohirsk and Prymorske, alongside pressure on the communications sustaining Orikhiv. He acknowledged that Russian troops were recovering positions lost during the summer and that Ukraine could still use a road he described as threatened.

The emphasis was on weakening the fortified approaches before reaching the regional capital. An earlier assessment by Alexander Burov, published in Argumenty i Fakty on 16 May, similarly discussed bypassing Orikhiv and advancing towards Zaporizhzhia from the east. His account treated the separation of the city from reinforcements and supplies as an essential part of the campaign.

Zaporizhzhia’s river crossings are central to that calculation. In an 11 August interview with Ukraina.ru, Alexei Anpilogov argued that disrupting connections between the banks could isolate the city’s eastern districts and make their defence substantially harder. His discussion focused on transport interruption rather than the destruction of the DniproHES dam itself.

This places Zaporizhzhia at the intersection of two strategic possibilities: isolating Ukrainian forces east of the Dnieper and eventually securing access to territory west of it.

Those possibilities must be distinguished. Occupying the eastern districts would not, by itself, deliver a secure crossing. Russia would also need control of the opposite bank and usable infrastructure, whether captured, repaired or newly established. A bridge disabled to obstruct Ukrainian supplies would not automatically become available for Russian traffic.

The city’s significance as a potential crossing centre is therefore a geographical inference, not evidence that an intact-bridge seizure plan has been disclosed. The Russian sources examined are more explicit about isolating Zaporizhzhia than about how a subsequent crossing would be secured.

A recent Ukrainian assessment nevertheless recognises the wider threat. In an interview with Ukrainska Pravda on 10 November, Yevhen Lasiichuk, commander of Ukraine’s 7th Air Assault Corps, identified pressure from the Orikhiv direction to the south and the Huliaipole direction to the east. He described Russian attacks on transport infrastructure as preparations for a logistical blockade, and considered a possible movement around Zaporizhzhia towards Dnipro city. He also raised the possibility that the pressure was intended to draw Ukrainian forces away from Donbas.

For the broader hypothesis, Zaporizhzhia adds a simultaneous southern pressure to the sequence running west from Donbas. Ukraine may have to defend its eastern fortress belt, preserve the army behind it and protect a major Dnieper crossing centre at the same time.

If Russia eventually secured both banks and sustainable crossings at Zaporizhzhia, the city could support operations farther west. Until then, the immediate connection with Donbas is the competition for Ukrainian forces and the attempt to weaken the transport network on which successive defensive lines depend.

Why Odesa enters the calculation

Vlad Shlepchenko’s discussion of Odesa offers the clearest account of the northern approach contemplated here.

Writing as a military commentator for Novorossiya, he rejected the idea of an easy amphibious assault or a straightforward advance through the river barriers along the southern route. Instead, he considered a movement across the Dnieper and into the regions around Kryvyi Rih and Kropyvnytskyi, followed by a turn south.

His concept envisaged a penetration of roughly 350 kilometres into territory west of the river before that southern turn, with Ukrainian forces pushed back across an extensive area broadly towards Uman.

The scale is essential to understanding the argument. This would be a campaign through central and southern Ukraine, rather than an isolated operation against a coastal city. Its premise is that the Ukrainian military position would already have deteriorated sufficiently to permit a deep advance.

A northern approach could alter the problem posed by the lower Dnieper, the Southern Bug and the fortified approaches to Mykolaiv. Instead of fighting directly along the most obvious coastal route, Russian forces would seek to reach Odesa from a direction made accessible by earlier victories inland.

Other Russian commentators have considered the prerequisites from different perspectives.

In January 2026, military analyst Yuri Knutov argued that an operation towards Mykolaiv and Odesa would depend on Russian control of Zaporizhzhia. He also regarded a major amphibious landing at Odesa as extremely difficult under the conditions then prevailing.

In a February assessment published by Voennoye Delo, Dandykin identified Kherson, Mykolaiv, Zaporizhzhia, Dnipro and Kryvyi Rih as major cities whose control would be relevant to a future operation against Odesa. His subsequent commentary connected the struggle for Sloviansk and Kramatorsk with the wider campaign towards Zaporizhzhia and potentially the Black Sea.

These assessments are not interchangeable routes or evidence of an agreed plan. They nevertheless share an important premise: an offensive against Odesa would emerge from a much larger transformation of the battlefield.

The strategic attraction is clear. Odesa is a major commercial port and one of Ukraine’s principal connections to international maritime trade. Its loss would carry economic and political consequences far beyond the city itself.

Russian control of a broader stretch of the coast could also alter the strategic geography of the northern Black Sea and raise the possibility of a territorial connection towards Transnistria, the Russian-backed separatist region of Moldova. The Telegram channel Voennaya Khronika, as reported by Voennoye Delo in January 2026, emphasised the importance of Odesa oblast’s proximity to Moldova and Romania.

Capturing Odesa would not automatically close every remaining Ukrainian maritime outlet. Nevertheless, the loss of the city and disruption of the surrounding port system could severely constrain Ukraine’s access to the sea.

Moscow could pursue some of those effects without occupation. Knutov has also discussed disrupting Odesa’s logistical connections, an approach that could impose substantial costs through attacks on ports and transport infrastructure.

The northern land approach is the more ambitious possibility. It becomes relevant if the earlier campaign has deprived Ukraine of enough organised fighting strength to prevent it.

From attrition to a wider campaign

A campaign extending from Donbas through central Ukraine would unfold through successive military decisions. Its later stages would depend on the results of the earlier ones, including the forces available for exploitation and the resistance remaining ahead.

Russian war correspondent Andrei Kots addressed those requirements in an interview published by Ukraina.ru on 16 December 2025. Asked whether Russia could deprive Ukraine of access to the sea, he argued that Moscow did not then possess the manpower and suitable equipment for a major operation towards Odesa. He pointed to losses among the Black Sea Fleet’s amphibious vessels, difficult river crossings and the possibility that further mobilisation would be required.

That was an assessment of conditions almost a year before this article, not a definitive judgment on what Russia could assemble for a later campaign. Its relevance lies in the requirements it identified.

Kots also described a battlefield saturated with drones, where troops often advanced in small assault groups using motorcycles or light vehicles. Those methods reflected the dangers of concentrating armour and infantry under persistent observation.

A wider advance would require Russia to build on the results of attrition: reinforce formations, maintain supplies and commit sufficient forces to exploit an opening. Russia’s larger population and demonstrated recruitment capacity provide resources for that task, although recruits must still be trained, equipped and organised.

The decisive relationship would be between the pace of Russian reinforcement and the pace at which Ukraine could rebuild its defence.

If Moscow could maintain pressure while generating forces for subsequent operations, a Ukrainian defeat in Donbas might become the beginning of a broader retreat. The loss of one defensive position could then make the next harder to hold, particularly if experienced formations had been destroyed rather than withdrawn.

Ukraine would still possess forces outside Donbas. Units assigned to other regions, border defence and training would not simply disappear after an eastern defeat. Some might be redeployed, while others would remain tied to commitments elsewhere.

But nominal brigade lists would reveal little about the army available to stop a new advance. What would matter is how many formations retained sufficient infantry, equipment, ammunition and command capacity to conduct sustained operations.

The Russian hypothesis therefore does not require an empty road beyond the Dnieper. It requires a progressive imbalance: Russian forces able to continue the campaign against Ukrainian formations increasingly unable to restore a coherent defence.

The war beyond the cities

The Russian commentaries illuminate successive parts of that possibility.

Myndar describes the defensive works Ukraine is preparing behind Donbas and the manpower on which they depend. Shlepchenko considers an approach to Odesa made possible by a deep advance west of the Dnieper. Knutov and Dandykin place the Black Sea objective within a wider territorial campaign. Kots identifies the forces and operational preparation such a campaign would require.

Their arguments do not establish an approved Russian timetable. They do show why the battle in Donbas can be understood as more than a struggle over the boundaries of Donetsk oblast.

If Ukrainian formations preserve their organisation while withdrawing, the positions around Pavlohrad could support another prolonged defence. If they suffer losses that leave them unable to regroup effectively, the significance of the Donbas battle would extend into the territory behind them.

The same question would recur at each stage: how much of Ukraine’s fighting strength remained, and could it be concentrated in time to hold the next position?

That is why the destruction of formations matters more to this hypothesis than the accumulation of captured settlements. Territory can be abandoned while an army survives. Once the army’s experienced personnel, command structures and cohesion have been lost, even substantial defensive works may be difficult to hold.

Odesa remains the distant objective contemplated by some Russian commentators. The immediate contest concerns the Ukrainian army defending the approaches to Sloviansk and Kramatorsk, and whether it can emerge from that battle capable of fighting another.

The strategic paradox is that Ukraine’s strongest defensive belt could become the place where it expends the forces needed to defend the country beyond it.