Russian forces are attempting to advance along almost the entire front in eastern Ukraine while trying to establish a buffer zone in northeastern Sumy Oblast, Commander-in-Chief Oleksandr Syrskyi told journalists on June 21.
The comments come as Moscow launched a new summer offensive against Ukraine, disregarding calls by Kyiv and its Western partners for an unconditional ceasefire.
The offensive's goal is to reach the administrative borders of Donetsk and Luhansk oblasts in the east, and create a buffer zone in the border areas of the Sumy and Kharkiv oblasts, Syrskyi said at a meeting attended by the Kyiv Independent.
As of mid-June, Ukrainian defenders are fighting close to 695,000 Russian troops in Ukraine across a 1,200-kilometer (750-mile) front, the commander said, adding that Moscow recruited about 440,000 contract soldiers this year.
According to the open-source intelligence group DeepState, Russian forces occupied approximately 449 square kilometers (173 square miles) in May, the highest monthly figure this year.
Ukraine has managed to stop the Russian advance in Sumy Oblast at the moment, Syrskyi noted. "The situation there has been stabilized... we have recaptured Andriivka, and advanced between 200 and 700 meters in Yunakivka in a week," he said.
Russian forces are also attempting to fully oust Ukrainian troops from Russia's home territory in the Kursk and Belgorod oblasts.
"We control about 90 square kilometers (35 square miles) in the Glushkovsky district of Russia's Kursk Oblast," Syrskyi said.
Ukraine launched the cross-border offensive into Kursk Oblast — bordering Ukraine's Sumy Oblast — last August, initially seizing 1,300 square kilometers (500 square miles) but losing the vast majority of this territory in a Russian counteroffensive earlier this year.
Moscow initially declared to have fully liberated the region on April 26, but this claim was rejected by Ukraine and later disputed by Russian officials themselves.
Kyiv has said the incursion was meant to preempt a Russian offensive into Sumy Oblast and force Russia to redirect troops fighting in Donetsk Oblast.
Syrskyi stressed that at one point, the Kursk operation drew in almost 63,000 Russian soldiers, which, in addition to North Korean soldiers, amounted to about 70,000 troops deployed in the region.
"In April 2025, Russian units – and this, I remind you once again, is about 60 thousand people... were tasked with moving to new sectors and reinforcing Russian assault groups in the Pokrovsk, Toretsk, Lyman, Zaporizhzhia, and Kherson directions," Syrskyi said.
"But our actions in the Glushkovsky district of Russia's Kursk Oblast thwarted these plans." At the moment, about 10,000 Russian soldiers are fighting in the Glushkovsky district, the commander added.
Syrskyi also said Russian assault units approached the administrative border of Dnipropetrovsk Oblast but were thrown back.
"As for our plans and intentions. Of course, we will not simply remain in a blind defense... Therefore, we combine defensive actions with active defense and active offensive operations," Syrskyi said.
For this purpose, the Ukrainian military is scaling up its assault units, which were created at the beginning of the Kursk operation and are currently deployed in all areas of the front, he added.
Kollen Post
(Updated: )
