As Russia strikes Europe again, when will this hybrid war with Nato turn physical? - ANALYSIS: As Russia provokes Europe with drones, jets, and strikes on tankers, and is the prime suspect in the bombing of a Polish train,

NATO fighter jets were scrambled and ground-based air defense systems put on high alert in Poland and Romania during an overnight Russian attack on Ukraine.

Ukrainian officials say a missile and drone attack killed dozens, right as the U.S. Army secretary arrived to push for peace talks.

Military capability of Western alliance remains 'formidable' despite questions around US commitment to untested 'mutual assistance' agreement

Frontline medics and soldiers near Kramatorsk in eastern Ukraine tell world affairs editor Sam Kiley how Nato is far from ready for war with Russia – and is training for a bygone era