This is a special issue of the Russian Military Digest dedicated to the Russo-Ukrainian War, composed on the basis of numerous open sources. You can see older issues of the Digest here.
Kursk-Sumy Area
Fighting in the area continued without confirmed major changes in territorial control.
Kharkiv Area
Fighting in the area continued without confirmed major changes in territorial control.
Kupyansk-Lyman Area
Ukrainians counterattacked in the area of Kupyansk, liberating villages Kindrashivka and Radkivka, pushing Russians out of Moskovka, and cutting off the Russians within the city of Kupyansk from the rest of the Russian-controlled territory. Ukrainians also advanced in the southern half of the city.
Ukrainians also counterattacked on the front southeast of Kupyansk, pushing Russians out of village Pishchane, and advancing towards Stepova Novoselivka.
Russians advanced northwest of Lyman, taking village Yarova and completing the capture of Derylove. Southeast of Lyman, Russians entered village Dibrova.
A static shot from the Russo-Ukrainian War interactive map. The Kupyansk frontline by the afternoon, 17 December 2025. All information on the maps is approximate.
Siversk Area
Russians completed the capture of Siversk, and advanced westward in the space between this town and village Riznykivka.
On the front southwest of Siversk, Russians advanced west of Fedorivka, reaching Pazeno.
Kostyantynivka-Druzhkivka Area
West of Kostyantynivka, Russians pushed forward within village Shakhove, and in the space east of Nove Shakhove.
Pokrovsk-Novopavlivka Area
Russians pushed forward in some areas north of Pokrovsk, likely taking village Rivne or most of it.
West of Udachne and Molodetske, Russians entered village Novopidhorodne.
Zaporizhzhia Area
South of Velykomykhailivka, Ukrainians re-entered village Orestopil.
Russians advanced towards Varvarivka, entering at least the southern part of the village.
Russians advanced in the town of Hulyaipole, entering its central part, as well as its northern and southeastern outskirts.
On the westernmost section of the southern frontline in Zaporizhzhia area, Russians advanced east of Stepnohirsk, in the direction of village Lukyanivske.
Black Sea-Dnipro River Area
Fighting in the area continued without major changes.