Former NATO Secretary General Jens Stoltenberg has explained why NATO did not impose a no-fly zone over Ukraine at the start of Russia's full-scale invasion in 2022.

"If you look at Russia's current capabilities and combat power, Russia could kick off a small-scale attack against NATO territory as early as tomorrow," Lieutenant General Alexander Sollfrank, head of the NATO ally's joint operations command, told Reuters.

Ukraine's top military commander, Oleksandr Syrskyi, told the New York Post that Russia was concentrating some 150,000 troops on a drive to capture Pokrovsk, with mechanised groups and marine brigades part of the push.

Russia has capacity for a limited attack against NATO territory at any time but a decision to act would depend on the Western allies' posture, a top German military official warned.

Russia’s “grey-zone” provocations will intensify in 2026. Europe faces the threat of direct conflict, marked by cyber-attacks and drone incursions

Britain and Belgium aren't blaming anyone for the mystery drones, but they're the latest in a series of airspace violations one NATO ally calls Russian "hybrid warfare."

Russia must never come to the assumption that it can win a war against NATO or one of the alliance's members, Germany's Chief of Defence Carsten Breuer warned in a speech to the country's top military brass in Berlin on Friday.

The US seems to be facing headwinds in persuading Volodymyr Zelenskyy and NATO allies not to interfere with its efforts for a peaceful settlement of the Ukraine crisis, Russian Foreign Minister Sergey Lavrov said Sunday.

Poland and Romania are deploying a new weapons system to defend against Russian drones, following a spate of incursions into NATO airspace in recent months that exposed the alliance’s vulnerabilities and put Europe on edge.

Azerbaijan’s growing NATO ties and Western partnerships are reshaping the balance of power in the South Caucasus.