Five recent moves would likely please the Russian President, Polish Prime Minister Donald Tusk said.

On the 1,500th day of war, Putin launches missile and drone strikes across Ukraine, hitting civilians and prompting NATO fighter alerts

NATO members Estonia and Latvia say stray drones hit their territory amid one of Moscow's biggest assaults on Ukraine.

NATO’s secretary general is heading to the White House next week as President Donald Trump lashes out over European allies’ refusal to join the U.S. and Israel’s war with Iran.

NATO's chief said on Monday that there is a "lone and broken Russian submarine limping home from patrol" in the Mediterranean Sea.

This paper looks at the lessons to be drawn from sabotage attacks attributed to Russia against civilian infrastructure and logistics in European NATO countries, and questions NATO’s preparedness for future warfare.

By Phil Stewart WASHINGTON, March 31 (Reuters) - Defense Secretary Pete Hegseth declined on Tuesday to reaffirm the U.S. commitment to NATO's collective defense, saying that would be up to President Donald Trump after key European allies refused to stand with the United States in the war against Iran.

Russia cannot launch an attack on NATO this year or next but is planning to increase its forces significantly along the alliance's eastern flank, depending on the outcome of the war in Ukraine, a senior European intelligence official said. Speaking in an ...

An Estonian security expert argues Germany, not the Baltics, is Russia's logical target to cripple NATO's European security.