The Quiet Collapse of Russian Infantry Doctrine in Eastern Ukraine

Tuesday 28 April 2026

The war in Ukraine has always been at its core a contest between adaptation and inertia. While the early months of the full-scale invasion launched by Russia in February 2022 revealed a series of operational failures at the strategic and logistical levels, it is only in the grinding attrition of the eastern front that a deeper and more consequential failure has emerged — the quiet, almost imperceptible collapse of Russian infantry doctrine as a coherent system of warfare.

This collapse has not occurred suddenly, nor has it been formally acknowledged by any official institution. Rather it has unfolded incrementally, concealed within casualty figures, tactical improvisations and the increasingly fragmented nature of Russian assaults along the Donbas front. What once presented itself as a doctrine rooted in mass, coordination and combined arms integration has devolved into something far more primitive: a reliance on expendability.

To understand the scale of this transformation one must begin with the theoretical foundations of Soviet and post-Soviet infantry doctrine. Historically Russian infantry tactics were predicated upon overwhelming force — not merely in numbers, but in synchronisation. Infantry was never intended to operate in isolation. Instead it was to advance under the protective umbrella of artillery barrages, armoured spearheads and close air support. This orchestration was designed to break enemy lines through shock and saturation, minimising exposure and preserving combat effectiveness.

In practice however this system has proven increasingly untenable in the conditions of modern eastern Ukraine. Ukrainian forces, drawing upon NATO-supplied intelligence, precision munitions, and increasingly sophisticated drone reconnaissance, have systematically dismantled the assumptions upon which Russian doctrine depends. Artillery concentrations are detected and targeted before they can fully deploy; armoured columns are ambushed by anti-tank systems; infantry formations are exposed in terrain that offers little concealment against aerial surveillance.

The result has been a gradual stripping away of the doctrinal scaffolding that once supported Russian infantry operations. What remains is the infantryman himself — often poorly trained, inadequately equipped, and thrust into combat with minimal coordination or support.

Nowhere is this more evident than in the pattern of small-unit assaults that have become characteristic of Russian operations in eastern Ukraine. Rather than advancing in battalion-sized formations supported by armour and artillery, Russian infantry are increasingly deployed in fragmented groups of five to ten soldiers, tasked with probing Ukrainian positions, identifying weak points and, more often than not, absorbing fire.

These assaults are not designed to succeed in the conventional sense. Instead they function as a form of reconnaissance through sacrifice. Each failed advance yields information — the location of Ukrainian firing positions, the responsiveness of defensive units, the density of minefields. Subsequent waves may then attempt to exploit these insights, though often with little greater success. This is colloquially known as the "meat grinder".

Such tactics reflect not innovation but desperation. They represent a departure from doctrine rather than its evolution. The Russian military has not so much adapted to modern warfare as abandoned its own principles in the face of operational reality.

One of the most striking consequences of this shift is the erosion of unit cohesion. Traditional infantry doctrine places significant emphasis on the integrity of units — the bonds between soldiers, the continuity of command, and the accumulation of shared experience. In eastern Ukraine, these elements have been systematically undermined. High casualty rates, rapid rotations, and the incorporation of disparate personnel — including mobilised civilians, penal recruits and private military contractors — have created formations that lack both identity and resilience.

Without cohesion, discipline becomes fragile. Without discipline, coordination becomes impossible. The infantryman ceases to be part of a structured force and becomes instead an individual actor within a chaotic environment. Orders, when they are given, are often simplistic and immediate: advance, occupy, hold. The broader operational context is frequently absent, either unknown or irrelevant to those tasked with execution.

This fragmentation has also had profound implications for morale. While it is difficult to measure morale with precision, its effects are visible in behaviour — reluctance to advance, increased rates of desertion, and the growing reliance on coercive measures to maintain order. Reports from the front suggest that some Russian units operate under the implicit threat of punishment should they retreat, a practice that further degrades trust between soldiers and their commanders.

At the same time the technological environment of the battlefield has accelerated the obsolescence of traditional infantry tactics. The proliferation of drones — both for reconnaissance and direct attack — has transformed the nature of exposure. Movement, once concealed by terrain or darkness, is now subject to constant observation. Infantry advancing across open ground are not merely vulnerable; they are visible in a way that renders concealment almost impossible.

Ukrainian forces have capitalised on this visibility with ruthless efficiency. Small, agile units equipped with drones and precision-guided munitions are able to engage Russian infantry at distances and with accuracies that negate the advantages of mass. The battlefield becomes a network of sensors and shooters, in which the concentration of troops serves only to increase the density of targets.

In this context the Russian reliance on repeated infantry assaults appears increasingly anachronistic. It is a method of warfare rooted in a different technological era, one in which numbers could compensate for deficiencies in precision and coordination. In eastern Ukraine this equation no longer holds. Numbers are consumed faster than they can be replaced, and each loss contributes to the degradation of the very system that depends upon them.

Yet it would be a mistake to interpret this collapse as a sign of imminent Russian defeat. On the contrary, the persistence of these tactics reflects a grim form of sustainability. Russia’s capacity to mobilise personnel — whether through conscription, coercion or economic incentive — allows her to continue operations even as the effectiveness of those operations declines. The war becomes one of endurance rather than manoeuvre, in which the objective is not decisive victory but the gradual exhaustion of the opponent.

For Ukraine this presents a complex challenge. The degradation of Russian infantry doctrine reduces the immediate threat posed by coordinated offensives, but it also entrenches a form of warfare that is inherently attritional. Each failed assault imposes a cost not only on Russia but on Ukraine as well — in ammunition, in fatigue, and in the psychological toll of constant engagement.

The long-term implications of this doctrinal collapse are difficult to predict. It is possible that Russia will eventually undertake a process of reform, integrating lessons learned and developing new approaches better suited to the realities of modern warfare. It is equally possible that institutional inertia, combined with the pressures of ongoing conflict, will prevent such adaptation.

What is clear however is that the Russian infantry doctrine that entered Ukraine in 2022 no longer exists in any meaningful sense. In its place stands a fragmented, improvised system that relies less on coordination than on persistence, less on strategy than on repetition.

This transformation has occurred quietly, without the dramatic markers that typically signal military change. There has been no formal declaration, no doctrinal publication, no public acknowledgement. Yet on the fields and forests of eastern Ukraine its effects are unmistakable.

The collapse of doctrine is not merely a technical matter; it is a reflection of deeper institutional failures — of planning, of leadership, and of the ability to reconcile theory with reality. The story of Russian infantry in eastern Ukraine is not simply one of tactical adaptation or failure. It is a story of a military system struggling to understand the war it is fighting, and in that struggle losing the very principles that once defined it.