”This is not too late,” Pistorius said.

The arrival of 31 American Abrams tanks is expected to take far longer, given the complexity of the systems and the logistics of getting a battalion across the Atlantic Ocean and into eastern Ukraine. In the meantime, the US will begin a “comprehensive training program” for the Ukrainians, which will require significant maintenance once they are deployed, according to the White House.

‘We have to defend our sky’

Kyiv will hope that Germany’s Leopards are incorporated into their operations before an anticipated Russian offensive in the spring begins.

Alongside Russia’s Thursday attack on Ukraine came another round of anger from the Kremlin over the supply of tanks. President Vladimir Putin’s spokesman Dmitry Peskov said Thursday that Moscow sees the delivery of modern Western battle tanks to Ukraine as “direct involvement” in the conflict between Ukraine and Russia.

But NATO nations dismissed Russia’s ire, and shown a willingness to open up a possible new stage of the war with weapons that will allow Ukraine to take the fighting to Moscow’s forces, rather than focus on repelling Russian attacks.

Kyiv is also continuing to press for more Western stocks, including improved missile systems and modern fighter jets. “We have to unlock the supply of long-range missiles to Ukraine, it is important for us to expand our cooperation in artillery, we have to achieve the supply of aircraft to Ukraine,” Zelensky said, adding he had spoken with NATO chief Jens Stoltenberg about the desire.

Zelensky referred to the request as “a dream,” but also “an important task for all of us,” indicating another lengthy period of international dialogue in which Ukraine will look to warm up the West to the entire of stepping up its military aid again.

The country’s defense minister meanwhile told CNN on Wednesday that Ukraine’s “wish list” for Western-supplied weapons includes fighter jets.

“I sent a wish list card to Santa Claus last year, and fighter jets also [were] including in this wish list,” Oleksii Reznikov told Christiane Amanpour.

But he said that his government’s first priority was air defense systems, to prevent Russia from carrying out air and missile strikes. “We have to close our sky, to defend our sky,” he said. “That’s priority number one. After that, we need to get more armed vehicles, tanks, artillery systems, UAVs, etc. etc. We have people, but we need weaponry.”

On the ground, Russian forces were “intensifying their pressure” on the eastern city of Bakhmut, Ukraine’s deputy defense minister said on Wednesday.

“The intensity of the battles is increasing,” Hanna Maliar said on Telegram. “The enemy is intensifying their pressure at the Bakhmut and Vuhledar directions. Heavy fighting continues.” That account tallies with two Ukrainian soldiers in Bakhmut, who said Wednesday that Russian forces were attempting to advance north and south of the city, with one telling CNN that the situation was “very alarming.”

CNN’s Maria Kostenko, Jo Shelley, Claudia Otto, Nadine Schmidt and Uliana Pavlova contributed reporting