Denmark said Russia has been escalating its hybrid attacks, and that Russian warships had sailed on collision courses with its ships in key waters.

Russia has accused the U.K. of plotting a sabotage operation in a move that shows Moscow is setting the conditions for a conflict with NATO, according to the Institute for the Study of War (ISW).

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

Intrusions into NATO’s airspace blamed on Russia have reached an unprecedented scale, raising questions about whether the Kremlin is trying to test the alliance’s willingness to respond to a direct attack or divert its attention and resources from the war in Ukraine.

Recent Russian drone violations into NATO airspace have sparked a new sense of urgency for the alliance to acquire low-cost defenses.

I hope that everybody recognizes now that there is a hybrid war, and one day it’s Poland, the other day it’s Denmark and next week, it will probably be somewhere else.”

Russian incursions into NATO airspace are fueling divisions among allies, with some warning that repeated Article 4 signals risk weakening deterrence without real action.

A Russian surveillance plane recently flew within a few hundred meters of a German frigate operating in the Baltic Sea.

A rash of Russian violations of NATO airspace last month has prompted some allies to recall Turkey's swift and deadly response a decade ago, when it shot down a Russian fighter jet that had crossed over its southern border.

NATO faces increased Russian testing through gray-zone tactics as Trump warns the Ukraine war could lead to World War III with Moscow.

Russia’s aerial bombardment, particularly on sites close to NATO territory to the west of Ukraine, have frequently pushed the alliance to protect its airspace with fighter jets. Member nations are collectively obliged to respond to attacks on other alliance nations under Article 5 of the founding treaty.