European nations are constructing a defensive wall along NATO's eastern frontier as Western intelligence agencies warn Russia could be militarily capable of attacking the alliance within five years. To assist with the construction of defensive works,

Estonia has started constructing concrete bunkers along its border with Russia as nations on NATO’s eastern flank rushes to build up land defenses. The Baltic states of Estonia, Latvia and Lithuania signed an agreement in January 2024 to beef up protection along their land borders with Russia and Moscow’s key ally, Belarus.

As Georgia balances its aspirations to join NATO against mounting pressure from the Russian Federation, a new security partnership is taking shape in the South Caucasus.

BERLIN — Ukrainian President Volodymyr Zelensky on Sunday voiced readiness to drop his country’s bid to join NATO in exchange for Western security guarantees, but rejected the U.S. push for ceding territory to Russia as he held talks with U.S. envoys on ending the war.

Former Swedish Foreign Minister Tobias Billström said after the Ukraine war, Europe must be ready for further Russian aggression.

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

Ukraine has relinquished its ambition of joining the NATO military alliance in exchange for Western security guarantees as a compromise to end the war with Russia, President Volodymyr Zelenskyy said ahead of talks with U.S. envoys in Berlin.

A British naval supply ship with an on-board helicopter was deployed to track the stealthy Kilo-class submarine Krasnodar, the Royal Navy said.

Ukraine's internal security agency said the attack damaged and disabled a Russian Kilo-class submarine in the port city of Novorossiysk.