KHARKIV, Ukraine (AP) — Ukrainian President Volodymyr Zelensky says the war with Russia is in a new stage, with winter expected to complicate fighting after a summer counteroffensive that failed to produce desired results due to enduring shortages of weapons and ground forces.

Despite setbacks, however, he said Ukraine won’t give up.

“We have a new phase of war, and that is a fact,” Zelenskyy said in an exclusive interview Thursday with The Associated Press in Kharkiv in northeastern Ukraine after a morale-boosting tour of the region. “Winter as a whole is a new phase of war.”

Asked if he was satisfied by the results of the counteroffensive, he gave a complex answer.

“Look, we are not backing down, I am satisfied. We are fighting with the second (best) army in the world, I am satisfied,” he said, referring to the Russian military. But he added: “We are losing people, I’m not satisfied. We didn’t get all the weapons we wanted, I can’t be satisfied, but I also can’t complain too much.”

With winter set to cloak a wartime Ukraine once again, military leaders must contend with new but familiar challenges as the conflict grinds toward the end of its second full year: There are freezing temperatures and barren fields that leave soldiers exposed. And there’s the renewed threat of widespread Russian aerial assaults in cities that target energy infrastructure and civilians.

On Nov. 25, Moscow launched its most extensive drone attack of the war, with most of the 75 Iranian-made Shahed drones targeting Kyiv in a troubling precedent for the months ahead.

“That is why a winter war is difficult,” Zelenskyy said.

He gave a frank appraisal of the last summer’s counteroffensive.

“We wanted faster results. From that perspective, unfortunately, we did not achieve the desired results. And this is a fact,” he said.

Ukraine did not get all the weapons it needed from allies, he said, and limits in the size of his military force precluded a quick advance, he said.