"I did not see any intentions on the part of the Ukrainians to stop fighting for the winter," RIA Novosti quoted Milli as saying following a meeting of the contact group in Ramstein.
He noted that the Armed Forces of Ukraine have a strategic initiative.
According to him, the counteroffensive of the Ukrainian army is slower than expected.
Earlier, former Prime Minister of Ukraine Mykola Azarov said that the Ukrainian army had lost its offensive potential and was on the defensive.
Also, German military analyst Franz Stefan Gadi noted that the counteroffensive of the Armed Forces of Ukraine will soon end due to exhaustion.