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

A Norwegian P-8A "Poseidon" flew close to Russia's major submarine hubs in the Murmansk region before heading to the ...

Officials say Russian glide bombs and ballistic missiles have struck a Ukrainian prison and a medical facility as Russia’s ...

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

Business Insider got access to a NATO AWACS flight for an eight-hour surveillance mission over Eastern Europe.

Russian President Vladimir Putin's war in Ukraine and President Trump's tough stance on NATO have 'energized' the alliance ...

General Christopher Donahue, commander of U.S. Army Europe and Africa, said allies could seize Kaliningrad "in a timeframe ...

NATO's enhanced ground capabilities in the Baltic region spark Russian warnings as military focus intensifies on Kaliningrad ...

RFE/RL and the Conflict Intelligence Team (CIT), an open-source intelligence group, analyzed Russian and Western weapons production to assess whether Russia really has a twelvefold lead over the US ...

Russia’s arms production has significantly ramped up, but NATO still holds key advantages in modern artillery systems and ...

As NATO recalibrates its deterrence strategy, the return of US nuclear weapons to Britain is a powerful signal -- one aimed ...

Polish and Swedish military aircraft were scrambled in response to a large Russian drone and missile attack launched across ...