Putin’s overreach pushes the European Union toward NATO-style defense of Ukraine, forging deep ties that may outlast the war itself.

Special U.S. envoy Steve Witkoff says Russian leader Vladimir Putin agreed to allow the U.S. and Europe to offer Ukraine a security guarantee resembling NATO's collective defense mandate.

NATO's top military officials emerged from talks without a concrete plan to guarantee Ukraine's security – at least not one they were willing to discuss publicly.

European NATO leaders must not be naive when discussing a Ukraine peace force but face up to the reality that they would need to deploy tens of thousands of troops to the country for the long term, the head of Germany's soldiers' union said.

It’s not often that you have eight European leaders, including one whose country is at war, descend on Washington in as close to an unplanned snap visit as you can get. Let’s hope that the

Russian leader Vladimir Putin agreed at his summit with President Donald Trump that the United States and its European allies could offer Ukraine a security guarantee resembling NATO’s collective defense mandate as part of an eventual deal to end the war,

Secretary of State Marco Rubio told European counterparts Thursday the US will participate in post-war security guarantees for Ukraine but that the Trump administration believes Europe should take the lead,

NATO Chiefs of Defense reaffirmed support for Ukraine in a virtual meeting led by Gen. Alexus Grynkewich, joined by Gen. Dan Caine and all 32 allied leaders.

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

NATO allies and Ukraine are working together to make sure security guarantees for Ukraine are at such a robust level that Russia will never try to attack again, NATO chief Mark Rutte said on Friday, adding that Europe and the United States would be involved in providing them.

The B-1s were joined by Gripen fighters from NATO allies Hungary and Sweden during their flyover of Latvia, which lies to the west of Russia.

Many of the drones aren’t particularly fast or high-tech, but they are cheap enough for the Kremlin to launch more than 700 in one night, in an effort to overwhelm Ukraine’s air defenses. Here’s what we know.