NATO aircraft were scrambled Sunday night to respond to a Russian attack on Ukraine, the Polish military said Monday.

NATO chief Mark Rutte is pushing the Allies to swiftly build up their jet fighters and missiles to avert an all-out war with ...

As the front lines froze, and air defenses got better, Russia and Ukraine pivoted away from close bombing runs to standoff ...

A Ukrainian air force officer was arrested and charged with spying for Russia by leaking the locations of Kyiv’s prized F-16 ...

The West can help Moldova protect its democracy, but that requires recognizing how Russia uses hybrid warfare and countering Moscow in its own space, with both offensive and defensive influence ...

Increased spending on defense and a new Russian conscription law are signs of the Kremlin's increasingly aggressive posture ...

(Reuters) -One of the Russian government’s premier cyber espionage units is deploying malware against embassies and ...

The publication of a book on Lithuanian history signals Russia’s intent to subvert Lithuania’s sovereignty and identity.

Russia's war against Ukraine is aimed at preserving the authoritarian regime in Russia itself and has nothing to do with the ...

Russia has issued a sharp warning to Bulgaria after the Bulgarian Parliament labeled Moscow a “state sponsor of terrorism” ...

Germany's armed forces reported a 28% surge in soldier recruits from January to late July, compared with the same period last ...