Ahead of leaders from the North Atlantic Alliance, concerns are growing that they will not be able to defend Europe from Russia without US support. For them, Ukraine's victory over Russia is now essential,

Tensions along NATO's eastern flank are high because of the risks posed by Russian military actions near the borders of alliance member states.

The Russian cargo ship was thought to be heading to Syria to transport military equipment out of the Tartus naval base.

After years of fighting in Ukraine, the Russian military’s ability to fight modern, maneuver-type warfare has largely diminished.

Russia is keen to disrupt, weaken or even divide NATO and one way of encouraging that might be to convince the U.S. that war is coming with the alliance in Europe and to ask America if it wants to be dragged into it. This especially matters as Trump's incoming administration forms its policies toward NATO and Russia.

NATO’s secretary-general says he wants to discuss ways to put Ukraine in a position of strength for any future peace talks with Russia during a meeting Wednesday with Ukraine’s president and a small number of European leaders.

The popularity of weapons training in Finland has soared in recent months, driven by concerns over expansionist neighbor Russia.

The transfer marks the end of an era when Russia played an arguably oversized role in determining which countries could operate in Syria’s contested airspace.

To understand recent fears about the possible escalation of Russia’s war on Ukraine into a nuclear conflict, we must revisit its beginnings, where the groundwork for this crisis was laid. “I believe that NATO would not directly interference in the conflict even in this scenario,

Russia's friends — or frenemies — aren't all pariah states. Some of them enjoy good relations with the West, too.

Western equipment has slotted in to Ukraine's embattled, Soviet-era military throughout the war, including long-range missiles and advanced fighter jets.