Russia lost 42,020 troops in August while capturing 90 sq km, ISW says
This digest was compiled by AI from multiple sources — links to the originals are below.
Russian forces captured about 90.35 square kilometers in Ukraine in August while losing at least 129.8 square kilometers to Ukrainian counterattacks, according to the Institute for the Study of War. Russian casualties reached 42,020 killed or wounded in August, the second consecutive month above 40,000. The advance fell far short of the Kremlin's goal of seizing all of Donbas by autumn.
Key Facts
- Russian forces captured about 90.35 sq km in August, while Ukrainian counterattacks reclaimed at least 129.8 sq km, according to ISW.
- Russian casualties in August reached 42,020 killed or wounded, following 42,860 in July.
- In August 2025, Russian forces captured more than 505 sq km, over five times the August 2026 figure.
- Russia controls about 72% of Kostiantynivka, a key Ukrainian defense hub in Donetsk Oblast.
- Russia cannot sustainably recruit more than 30,000 new contract soldiers per month in 2026, according to Janis Kluge of the German Institute for International and Security Affairs.
Territorial Gains and Losses
Russian units established control over roughly 90.35 sq km in August, while Ukrainian counteroffensive operations reclaimed at least 129.8 sq km, according to ISW. Analysts caution that the actual scale of Ukrainian successes may be larger. In August 2025, Russian forces seized more than 505 sq km, meaning the area of new captures fell more than fivefold year over year. The main Russian advances occurred in Donetsk Oblast, but Russian troops failed to fully capture Kostiantynivka, a key Ukrainian defense node. Russia controls about 72% of Kostiantynivka, where fighting has continued for several months.
Casualty Rate
ISW estimates that about 42,020 Russian servicemen were killed or wounded in August, following 42,860 in July. This marks the second consecutive month with losses above 40,000. On average, about 465 Russian servicemen were killed or wounded for every square kilometer captured in August. In March, Russian losses were estimated at about 31,960 personnel. Ukrainian authorities have previously set a goal of inflicting 50,000 Russian casualties per month.
Recruitment Constraints
The slowdown in Russian advances coincides with problems replenishing personnel. Janis Kluge of the German Institute for International and Security Affairs assesses that Russia cannot sustainably attract more than 30,000 new contract soldiers per month in 2026. At the start of the year, monthly recruitment fell to about 24,000. ISW notes that if current loss rates and recruitment levels persist, the Russian army's ability to sustain the offensive without additional mobilization measures becomes increasingly uncertain. The Kremlin had tasked its military command in the spring with completing the seizure of Donbas by autumn, but by early September Russian troops had not achieved full control of the region.
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Russia lost 42,020 troops in August while capturing 90 sq km, ISW says
