Russia has started to prepare for war with Poland, the country’s military chief has said, in comments that echo warnings by European leaders about Moscow’s intentions post-Ukraine. General Staff of the Polish Armed Forces,

Professor Michael Clarke has been answering your Ukraine war questions - scroll down for the best of his answers or watch back in the video below.

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.

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

Poland has scrambled fighter jets just hours after a top general warned Russia is preparing for war against NATO. The Eastern European country's Armed Forces posted on social media details of "preventative" actions taken overnight to secure airspace in parts of Poland close to regions in Ukraine under attack from Russia.

A Russian spy ship has entered British waters and directed lasers at military pilots, Britain’s defense secretary said Wednesday, as he warned that the country was facing a “new era of threat” from hostile actors.

As Russia's war in Ukraine continues, Estonian Foreign Minister Margus Tsahkna spoke with NBC News' Joe Fryer and Savannah Sellers about the importance of NATO members standing together in the face of Russian aggression and hoped that a peace plan could still happen.