Russian forces conducted an unsuccessful reduced company-sized mechanized assault consisting of eight vehicles east of Kolisnykivka southeast of Kupyansk.

Russian forces conducted an unsuccessful reduced company-sized mechanized assault east of Kolisnykivka

On 12 December, it became known that Ukraine's defence forces had carried out a successful counterattack near Kupiansk and encircled a Russian grouping in the city.

A T-72 tank, seven power generators, and four mortars were destroyed. Two field ammunition depots and two UAV control points were burned down, as well as a dozen enemy shelters and enemy infantry – the result of the performance of attack drone operators from the Phoenix UAV unit at the Pomsta Brigade in the Kupiansk axis

A Russian attack with a multiple-launch rocket system against the village of Kutkivka in Kharkiv Oblast damaged an educational institution

Russian Su-34s deploy aerial guided bombs against Ukrainian positions and Kharkiv

Soldiers of the 3rd Separate Assault Brigade's 'Thunder Riders' destroyed an enemy command and observation post using an FPV drone in the Kharkiv direction.

Ukrainian forces destroyed an enemy mortar and used cluster munitions against enemy manpower to thwart an assault attempt in the same operation.