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

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

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

During his visit to the U.K. on Monday, President Donald Trump expressed further frustration with Russian President Vladimir ...

NATO's commitment to spend 5% of GDP on defense by 2035 was meant to unify the alliance, but it's revealing dangerous fault ...

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

At the end of the day, the EU needs U.S. weapons to keep Ukraine afloat into its struggle for survival against Russia.” ...

President Trump said he had decided to shorten a 50-day deadline he had given Russia to end the conflict or face punishing ...

An unidentified drone suspected to have come from Belarus entered into Lithuanian airspace on Monday, according a local ...

Russian soldiers call the practice a sacrifice to Baba Yaga, a fearsome witch from Slavic folklore who feasts on her victims.

RFE/RL and the Conflict Intelligence Team (CIT), an open-source intelligence group, analyzed Russian and Western weapons ...