Ukraine's President Poroshenko said Moscow showed no signs of backing off from his country and recent military activity shows the Kremlin is preparing for a much bigger conflict.
Last year, most Americans saw "friendly cooperation" as the way forward with Russia, but now they want Russia's power actively limited.
Russian helicopters blasted their targets not far from where the U.S. and NATO allies have just begun fortifying their air defenses.
The 4,500-strong deployment and wider strategy is "fully operational," NATO's secretary general announced.
The top U.S. Army commander in Europe complained that Russia is being too secretive about upcoming large-scale military drills.
The U.S. is finishing up naval exercises with NATO allies in the Baltic region, but Russia has an even bigger display of military might in the works.
The Baltics have been particularly worried about Russia’s annexation of Crimea in 2014.
Russia and Belarus's neighbors are concerned about the huge drill they have planned.
The navy has scheduled a series of tests for the cruise missile armed Krasnodar submarine.
U.S. tanks are part of a military buildup designed to deter Russian aggression in Eastern Europe.
Interceptions have remained high since a huge spike in 2014.
The most popular destination was Norway.
The incursion lasted around a minute, Estonia’s armed forces reported.
Russia strongly protested the move to take down the Communist monument.
The return of Lithuania’s defense attache to Russia for 'familial reasons' has triggered much speculation.
Estonia’s Ministry of Defence claims Russian jets violated its airspace four times in 2016.
The alliance is demonizing Russia, according to Moscow.
The Ministry of Defense wants a new center to coordinate Baltic deployments.
The Baltic Saber Strike exercise will take troops from Germany to Estonia.
Aristidas Tamosaitis was detained in Moscow in May 2015.