Syrskyi also noted that the threat of a possible future Russian offensive operation against Kharkiv City is causing Ukraine to allocate additional forces and equipment to defending the city, although ISW continues to assess that the Russian military lacks the forces necessary to seize the city. 

Syrskyi stated that Ukrainian forces are monitoring the increased number of Russian forces regrouping in the Kharkiv direction, likely referring to Belgorod Oblast, and that Ukrainian forces have reinforced defensive positions in the "most threatened" areas with additional artillery and tank units.

Syrskyi‘s statement provides no indication about the imminence of the possible Russian offensive operation against Kharkiv City about which Ukrainian officials have recently warned.

Ukrainian military observer Kostyantyn Mashovets recently stated that Russian forces are regrouping elements of the 11th Army Corps (AC) and 6th Combined Arms Army (CAA) (both Leningrad Military District [LMD]) from the Kupyansk direction into Russia's newly-formed Northern Grouping of Forces and that the Northern Grouping’s best-equipped elements are concentrated in the Belgorod region direction. Elements of the 6th CAA have previously had exclusive responsibility for offensive operations northeast of Kupyansk, particularly near Synkivka.

Syrskyi noted that Ukrainian forces have recently improved their positions near Synkivka (northeast of Kupyansk) and a Russian milblogger claimed that Russian forces retreated a short distance from Synkivka due to manpower shortages in the area, suggesting that Russian forces have likely pulled at least some elements of the 6th CAA from the area.

ISW has not observed reports of elements of the 6th CAA operating in the Kupyansk direction since late March, and Russian forces are not conducting active offensive operations in the areas where elements of the 6th CAA were previously attacking.

Elements of the Russian 6th CAA were previously involved in offensive operations near Synkivka that began in October 2023 and continued throughout the winter and early spring 2024.

Likely elements of the 6th CAA’s 25th and 128th motorized rifle brigades conducted several company-sized mechanized assaults near Synkivka in December 2023, which resulted in significant armored vehicle losses and no tactically significant advances.

The brigades’ inability to seize Synkivka despite repeated mass infantry and mechanized assaults over a months-long offensive effort calls into question their combat effectiveness and the combat effectiveness of the 6th CAA and Northern Grouping of Forces more broadly. ISW continues to assess that a potential future Russian offensive to seize Kharkiv City would be an extremely ambitious undertaking that would pose significant challenges to Russian forces, particularly since Russian forces will be facing better-equipped Ukrainian forces following the arrival of US military assistance.

Russian forces would not have to seize Kharkiv City to reap the benefits of drawing Ukrainian manpower and equipment away from other critical areas of the frontline, however. The Russian military appears to be learning from past operational planning mistakes and may intend for the threat of a Russian offensive on Kharkiv City to stretch Ukrainian forces across a wider frontline in eastern Ukraine ahead of the start of the Russian summer offensive effort.