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Fortress Belt

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Russia’s Spring Offensive Quietly Targets Ukraine’s Fortress Belt from Lyman toward Slovyansk
world19 days ago

Russia’s Spring Offensive Quietly Targets Ukraine’s Fortress Belt from Lyman toward Slovyansk

ISW assesses Russia has likely begun its Spring-Summer 2026 offensive against Ukraine’s Fortress Belt in Donetsk Oblast, pressing in the Lyman direction toward Slovyansk with a dispersed, battalion-sized assault backed by air interdiction and drone strikes; Ukrainian forces report heavy Russian casualties and ongoing countermeasures, and ISW warns that major fortress-belt seizure this year is unlikely, though tactical gains at high cost are possible, as Ukraine maintains long-range strikes in Russia and advances near Kupyansk and Pokrovsk.

Russia gears up Fortress Belt offensive as drone warfare and recruitment expand
world1 month ago

Russia gears up Fortress Belt offensive as drone warfare and recruitment expand

ISW assesses Russia has likely begun artillery and drone-based battlefield preparation for a spring–summer 2026 offensive against Ukraine’s Fortress Belt in Donetsk Oblast, with shelling near Kramatorsk and Kostyantynivka and a continuing battlefield-air-interdiction campaign. Moscow is expanding recruitment for its unmanned-systems forces in universities while cracking down on pro‑war information space figures. The report notes a Russian drone incident near the Charles de Gaulle and alleged white-phosphorus usage in Kostyantynivka, though civilians remain in the area. Ukrainian forces have made some local advances and oil-depot strikes amid broader energy infrastructure damage, as Russia pursues a multi-axis, costly campaign.

Moscow stands firm on Ukraine demands as nuclear leverage threads through diplomacy and war
world2 months ago

Moscow stands firm on Ukraine demands as nuclear leverage threads through diplomacy and war

ISW reports that Medvedev used a three-way media push to reaffirm Russia’s unchanged demands on Ukraine—neutrality, demilitarization, and denazification—while rejecting security guarantees and signaling continued use of nuclear deterrence to extract concessions in US-led talks. Militarily, Russia maintains pressure around Lyman with aims toward Slovyansk, but Ukrainian counterattacks and logistical constraints likely push any major operation several months out; Kyiv has moved to restrict non-registered Starlink terminals to curb drone use, and Belarusian balloon incursions reflect broader cognitive warfare. ISW assesses a rapid seizure of the Fortress Belt remains unlikely, with fighting spanning Kharkiv, Pokrovsk, Oskil, and Donetsk directions and continued cross-border activity as part of a long, multi-front campaign.)

The Strategic Significance of Ukraine’s Donetsk Fortress Belt
world8 months ago

The Strategic Significance of Ukraine’s Donetsk Fortress Belt

Ukraine refuses to abandon the Donbas region, emphasizing its strategic importance as a fortified defense line that has held against Russian advances since 2014. The fortress belt, a network of fortified towns and natural defenses, is crucial for Ukraine's survival, and its loss would expose the country to further Russian advances and potential encirclement. Rebuilding such defenses elsewhere would be resource-intensive and time-consuming, and surrendering Donbas could lead to a broader Russian offensive into central Ukraine. The article highlights the high stakes of retaining this region for Ukraine's security and sovereignty.