Will Russia capture all of Donetsk Oblast by December 31, 2026?

Prediction markets put the probability at 5%: Will Russia capture all of Donetsk Oblast by December 31, 2026. Currently, markets see this as unlikely (5% YES). ​russia Claims Victory in Kostiantynivka, UK Defence Intelligence Disagrees.

What’s Happening

The question of whether Russia will capture all of Donetsk Oblast by December 31, 2026 remains constrained by the pace of fighting along Ukraine's fortress belt. On July 3, 2026, Russian Chief of the General Staff Valery Gerasimov briefed President Vladimir Putin that Russian forces had "fully captured" Kostiantynivka, a key urban centre in the region. UK Defence Intelligence disputed the claim, assessing that Russian forces occupy only around half of the city as fighting continues. The discrepancy underscores why the prospect of Russia capturing all of Donetsk Oblast is treated skeptically: the largest fortified towns — Kostiantynivka, Kramatorsk and Sloviansk — remain contested or in Ukrainian hands. [Defense Express, Jul 11]

The Institute for the Study of War (ISW) reported on July 9, 2026 that an anonymous active-duty Russian general, in an interview published by journalist Dmitry Kolezev on July 6, alleged the Kremlin is inflating battlefield successes to project sweeping advances while sustaining a war of attrition "that Russia cannot win." Hawks in Moscow point to incremental gains around the belt as evidence of momentum; ISW analysts caution that Russian forces face stiffening resistance and have shifted to attrition tactics reliant on drone and missile strikes against Ukrainian infrastructure rather than decisive breakthroughs. [ISW, Jul 10]

Complicating any timeline, Ukraine has escalated synchronized deep strikes, hitting Lukoil's Nizhny Novgorod plant, seaborne fuel tankers and a refinery in Mikhaylovsk, per Wall Street Journal reporting, straining Russian logistics. The structural factor determining whether Russia can capture all of Donetsk Oblast is arithmetic: with the fortress belt still holding and advances measured in weeks per settlement, seizing the remaining ~25% of the oblast within roughly five months would require a rate of gain far exceeding 2026's observed pace. [Crypto Briefing, Jul 12]

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