A full-scale invasion of Poland, in the manner Russia invaded Ukraine, is rather not viable, given Russia’s current military capacities, Poland’s military build-up and the collective defense guarantees of NATO membership, Michnik said, “however, this reality must not diminish Poland’s ongoing preparation.”

Russia unleashed missiles and drones across Ukraine, leaving at least 46 wounded in Kharkiv including children in one of its most intense bombardments of the invasion

Some of America's closest European allies say they're already in a gray zone between peace and war with Russia.

"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.

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.

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

The Polish government said it believes that Russian secret services are behind the bombing of a major railway line in the NATO country, in what Prime Minister Donald Tusk described as an “unprecedented act of sabotage".

The Merops -- which can use artificial intelligence to target enemy drones -- is just one of many similar systems that NATO countries are testing