"The American administration should critically consider what is happening and the possible risks," the Russian Embassy told Newsweek.

BRUSSELS — On his final day as NATO’s secretary general, after 10 years in the job, Jens Stoltenberg didn’t want to look back. But in an interview with POLITICO Magazine, he couldn’t help but share one great regret: that the West didn’t more forcefully intervene on Ukraine’s behalf after Russia first started biting into its territory in 2014.

Russia has sustained more than 600,000 casualties during the war in Ukraine, a sign of losses accelerating out of proportion with its gains, Pentagon officials said. Since the summer, Moscow has continued to take territory in Ukraine's eastern region of Donetsk,