While nuclear crises between the “Big Three” can still be managed, preventing an arms race will be much more difficult.

NATO defense chiefs meet Thursday to set the agenda for this month's annual summit, with military spending expected to be one ...

It has become a test of endurance, demanding every last reserve of strength, costing hundreds of thousands of lives.

Russian President Vladimir Putin communicated to U.S. President Donald Trump his intention to respond to Ukrainian drone ...

Europe has the money and the artillery shells, but key U.S. capabilities like operational intelligence and air defense would ...

To upgrade its drones, Moscow has been adding SIM cards to transmit data back to Russia and updating anti-detection methods.

A warlord gets a local toughie across town to ally with him and agree to bring in his armed muscle — right next door to ...

Drones are “ubiquitous, because they are quite useful, and they're demonstrating that every day in Ukraine,” one analyst told ...

Ukraine’s president wants his Western backers to speed up deliveries of air defense systems to counter Russian missile ...

The audacious attacks on Russian airfields highlight the power of unconventional, asymmetric warfare — and the threat to U.S.

Assaults in Russia and Ukraine have shown major military powers that they are unprepared for evolving forms of warfare, and ...

Ukraine’s HUR hacked into Russia’s UAC Tupolev, took 4.4GB of secret data on personnel, procurement and strategic bombers, ...