President Trump lashed out at the Russian leader on Tuesday, signaling an change in his posture toward the conflict.

Secretary of Defense Pete Hegseth did not inform the White House before he authorized a pause on weapons shipments to Ukraine ...

As Russia continues its attack on Ukraine, the role of NATO is at the forefront. Here's a quick overview of the alliance, the role that the United States plays within it, and what it's doing to ...

In the Strategic Concept, NATO allies describe Russia as “the most significant and direct threat to Allies’ security and to peace and stability in the Euro-Atlantic area.” Surveys now show ...

Mr. Stoltenberg said that NATO allies urged Russia to “immediately de-escalate the situation in Ukraine,” where close to 100,000 Russian troops have massed near the borders, and to respect the ...

But Russia has been weakened by the Ukraine war and is in no position to attack NATO, experts say. Instead, they say Putin wants to weaken and undermine NATO from within.

As Russia's assault on Ukraine enters its 17th month, the leaders gathered in Vilnius announced a long-awaited reform "path" that Ukraine can take to someday join NATO itself.

As Russia's war in Ukraine threatens NATO, the Baltic states say they're investing in defense more than ever. The efforts include increased spending, buying new weapons, and reinstating conscription.

The tension between Russia, NATO, and Ukraine that we see playing out today really picked up in 2008. That April, NATO held its annual summit in Romania at the palace of the parliament in Bucharest.

"NATO has known, since the invasion of Crimea in 2014 and the way Russia has been more obstreperous in general on NATO's borders, that NATO may need to be ready to fight and defend itself very ...

Russia, authors Christian Mölling and Torben Schütz said, "represents the greatest and most ­urgent threat to NATO countries." The alliance, the report said, is in a "race against time." ...

NATO’s ranks have grown to 32 countries since the Washington Treaty was signed 75 years ago. Sweden joined last year, worried by an increasingly aggressive Russia.