25th Combined Arms Army of the Russian Federation
The 25th Combined Arms Army is a formation of the Russian Ground Forces. Its headquarters is located in Belgorod. The army comprises several motorized rifle and tank divisions and brigades, including the 67th and 6th tank divisions. Its units have been engaged in combat operations on Ukrainian territory, particularly in the northern part of Donetsk Oblast and the border areas of Belgorod and Kursk oblasts.
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Ukraine's Third Army Corps confirms "Vivaldi" offensive near Lyman
Ukraine's Third Army Corps publicly confirmed on September 15 that it has been running an offensive operation codenamed "Vivaldi" in the northern part of Donetsk Oblast, east and northeast of Lyman. The corps revealed details of the first phase, which targeted Russian troop infiltration and logistics, and reported Russian losses in personnel, drones and equipment. The announcement broke months of operational secrecy around the fighting.