Ukraine's 'fortress belt' cities under intensified Russian assault as evacuations begin

Police in Donetsk are calling on residents to evacuate the neighbouring cities of Slovyansk and Kramatorsk, the largest settlements still under full Ukrainian control in the Donbas region. According to Pavlo Dyachenko of the Donetsk police, forced evacuations of families with children are already underway in the worst-affected areas.

"This is the only way to save your life," Dyachenko said, noting that security has deteriorated significantly in recent weeks. He described how Slovyansk, which used to be struck by glide bombs roughly once a week, is now hit almost every day.

Slovyansk, Kramatorsk and the nearby city of Kostyantynivka form part of what is known as Ukraine's "fortress belt" — a system of heavily reinforced defence lines in the east. However, reports indicate that Kostyantynivka now has only a limited presence of Ukrainian troops left, and Russia claims to be in full control of it.

The situation highlights the mounting pressure on Ukraine's defensive positions as Russian forces continue their push to seize the remainder of the Donbas region.

Why This Matters

The intensified bombing and forced evacuations signal a potential breakthrough for Russian forces in the Donbas, a long-contested region crucial to Moscow's war aims.
The displacement of families from these fortress cities indicates that Ukraine's defensive lines may be weakening under sustained assault, raising the risk of a significant territorial loss.
The humanitarian toll is escalating, with civilians forced to flee under dangerous conditions as basic security collapses.

Background

The Donbas region in eastern Ukraine has been a focal point of conflict since Russia's full-scale invasion began in 2022. Ukraine built a series of fortified positions, often called the "fortress belt," across Slovyansk, Kramatorsk and Kostyantynivka to defend against Russian advances. These cities have withstood repeated attacks, but recent Russian tactics involving heavy glide bombs have put them under extraordinary strain. The conflict has already displaced millions and devastated much of the region's infrastructure.

Key Perspectives

Ukrainian civilians and police: Residents face a stark choice between staying in increasingly dangerous cities or evacuating under fire. Police are actively urging departure, warning that staying is a lethal risk. Russian military: Russia claims to have taken control of Kostyantynivka, indicating it believes it is making decisive progress in breaking through Ukraine's defensive belt. Ukrainian military: Ukrainian forces appear to be maintaining a limited presence in Kostyantynivka and are fighting to hold Slovyansk and Kramatorsk, but the daily bombing suggests they are under severe pressure.

What to Watch

Whether Russian forces confirm full control of Kostyantynivka and begin advancing on Slovyansk and Kramatorsk.
The pace of forced evacuations in Slovyansk and Kramatorsk could signal whether Ukrainian commanders consider these cities defensible.
Western military aid deliveries and their impact on Ukraine's ability to counter glide bomb attacks from Russian aircraft.

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