Ukraine reclaims territory as it doubles attacks on Russian logistics

Ukraine said it reclaimed more of its territory than it lost during May, reversing a Russian trend of monthly net gains.

“The ratio of liberated and lost territories is almost 100 square kilometres (40 square miles) in our favour,” wrote Ukrainian commander-in-chief Oleksandr Syrskii on his Telegram messaging channel.

Ukrainian defence news outlet Militarnyi estimated net gains slightly higher, at 120 sq km (46 sq miles), citing sources within the military. Militarnyi said Russia seized 130 sq km (50 sq miles) and lost 250 sq km (100 sq miles) during the month.

The Institute for the Study of War, a Washington-based think tank using open source geolocated information, assessed Ukrainian gains higher still, saying Russia had seized or infiltrated 40 sq km (15 sq miles) in May but lost control of about 280 sq km (108 sq miles).

The ISW believed Ukraine actually reversed Russian gains in April, when it estimated Moscow’s gains at 28 sq km (11 sq miles) of Ukrainian land and lost 116 sq km (45 sq miles).

Syrskii said Ukraine reclaimed 600 sq km (230 sq miles) during the first five months of 2026.

Ukrainian military observer Kostyantyn Mashovets reported on June 10 that Russian forces had advanced into eastern Konstiantynivka, the southernmost of a “fortress belt” of four cities in the eastern region of Donetsk. Russian forces first infiltrated parts of the city last October, and now hold about 13 percent of it, said the ISW.

Russian President Vladimir Putin has prioritised the capture of the remaining one-fifth of Donetsk he does not possess, but his set deadlines to achieve this have been missed several times.