Russian warplanes entered Nato airspace in Estonia, triggering an emergency alarm in the Baltic Sea. The violation, which ...

U.S. Secretary of State Marco Rubio and his NATO counterparts meet in Turkey to prepare a pivotal summit of alliance leaders ...

NATO's eastern flank has grown increasingly nervous that Moscow's forces could quickly rebuild after a ceasefire in Ukraine.

“Putin’s Endgame: The Stakes Beyond Ukraine,” a new documentary from The Atlantic Council’s Eurasia Center, seeks to answer ...

How Russia and Ukraine are placed after three years of fighting ahead of a possible three-day ceasefire proposed by Moscow.

The top U.S. general is making his debut this week at NATO headquarters in Brussels, where defense chiefs are preparing for a ...

Opinion: The path to a transformed Alliance would begin with the adoption at the summit of transition plan, propose analysts.

New satellite images suggest that Russian forces are amassing near the border with Finland, fueling concerns that a conflict with NATO may be approaching.