Russia’s First New Division of 2026 Reveals How Much Its Army Has Changed

Russia has created its first newly reported division of 2026 and already committed it to fighting around Kostiantynivka—but the formation’s structure also shows how deeply years of losses have reshaped the Russian army.

The new 84th Motor Rifle Division was formed within Russia’s 3rd Combined Arms Army, formerly the 1st Army Corps of the so-called “Luhansk People’s Republic,” according to Defense Express, citing data from the Unit Observer project on October 3.

Its core was built around the existing 4th Motor Rifle Brigade, which had already been reinforced with two additional motor rifle regiments before becoming the foundation for the new division.

Russian forces have now deployed the formation in the Kostiantynivka sector, one of the most heavily contested areas of the Donetsk region.

Defense Express noted that this is the first reported case in 2026 of Russia creating a new formation at division level.

The pace is slower than in previous years. Three new divisions were reported in 2025, all created largely by expanding existing brigades. In June of that year, reports emerged that the 200th Motor Rifle Brigade could form the basis of the new 71st Division. Later, Russia also moved ahead with two new naval infantry divisions that had been planned several years earlier.

The contrast with 2024 is sharper still. Russia reportedly created seven new divisions that year. Before the full-scale invasion, the Russian army had roughly 12 divisions. By early February 2025, that number had risen to 23.

But the number of divisions does not tell the whole story. Defense Express points to a significant change in how Russia is structuring them.

Before February 2022, the core of a standard Russian motor rifle division typically consisted of two motor rifle regiments and a full tank regiment.

Reference figures for the prewar structure showed a division with as many as 12,000 personnel, roughly 187 tanks, 240 infantry fighting vehicles, 72 to 90 152mm artillery systems, 36 120mm mortars and 26 Grad multiple-launch rocket systems.

New formations created during 2024 and 2025 increasingly followed a different model: three motor rifle regiments supported by only a tank battalion rather than an entire tank regiment.

That is a major reduction in organic heavy armor. The 84th Division appears to continue that trend. Its predecessor, the 4th Motor Rifle Brigade, had already been supplemented with two motor rifle regiments before being expanded into the new formation.

Defense Express argues that the shift reflects two pressures Russia has faced throughout the war: enormous losses of armored vehicles and continuing personnel attrition.

Previously, reports emerged that Russian forces suffered 46,230 personnel losses in Ukraine in September, marking their highest monthly total recorded in 2026.

The September figure surpassed the previous monthly highs recorded during the summer, when Russian personnel losses reached 42,860 in July and 42,020 in August.

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