Russian jets violated NATO airspace over Lithuania for 18 seconds during suspected refueling exercise. Nation's president calls it a breach of international law amid tensions.

Poland scrambled fighter jets and an early warning aircraft, and put its ground air defenses and radar systems on "the highest state" of alert.

NATO and U.S. allies try to assuage fears over bolstering Russia as the Pentagon announces a U.S. troop reduction in eastern Europe.

The United States has informed NATO allies that it will reduce its troop presence along Europe’s eastern border with Ukraine.

A new Danish intelligence assessment blames Russia for employing various 'gray zone' tactics against its forces.

His book If Russia Wins: A Scenario, speculates that the Kremlin could make a move into Estonia as soon as 2028 because there are circles in Moscow who do not believe that every NATO member would back Article 5, which stipulates that an attack on one alliance member is an attack on all.

U.S. troops withdrawing from Romania spark Republican opposition amid Russia-Ukraine war tensions and concerns over weakened deterrence.

Two drones were spotted hovering near the Camp Reedo US Army base in Estonia, just 30 miles from the border with Russia as fears grow in the region over Putin's aggression

Russian Foreign Minister Sergei Lavrov said on Tuesday that Moscow is prepared to give NATO and EU countries a non-aggression guarantee, reiterating that Russia has no intention of attacking any of their current members.

His goals are to scare, exhaust and divide Europeans, causing them to question their support for Ukraine and undermine its efforts to repel Russia’s invasion. Ultimately, he also wants to make the United States look weak and fragment the NATO alliance.

Wall St. Insights NATO was founded in 1949 for the collective self-defense of the Western allied countries against Soviet expansionism.  For Russia to join, it would have to experience a political and social transformation that would make it fully cooperative and non-threatening to the alliance—an unlikely scenario.

Ukraine accuses Russia of using the 9M729 missile, key to the end of the INF Treaty, as the US plans to resume nuclear testing amid renewed East-West tensions.