The Army is overhauling how it fights in combat based on lessons from Russia's invasion of Ukraine, where drones have become the dominant weapon on the battlefield.

Interceptor drones, once a far-fetched experiment, are now a cornerstone of Ukraine's air defense, downing Russian Shaheds. NATO is watching closely.

Drone teams compete to ascend a scoreboard that rewards units for successful attacks. Ukrainian officials say the contest helps keep soldiers motivated.

Teams from each service went head-to-head in training events for unmanned systems, including convoy ambushes and reconnaissance.

Origin Robotics has products in Ukraine and is building with defending NATO in mind. It says Ukraine shows that simpler weapons are sometimes needed.

At a secret location in rural Ukraine, columns of attack drones are assembled at night and in near silence to strike deep inside Russia. Since the summer, Ukraine’s long-range drone campaign has ramped up dramatically,

Video from the Ukrainian military's first-person drones has captivated millions, but the footage offers only a narrow view of a robotics revolution that is reshaping combined-arms warfare.

In the city of Kherson, in southern Ukraine, small drones routinely target ordinary people by dropping hand grenades, and record video documenting their attacks, a U.N. commission reported.

Many Danes are rethinking their personal security, and stocking up on emergency supplies, amid unidentified drone appearances. Denmark's leaders warn that Russia is waging a "hybrid war."

EXCLUSIVE: Russia struck Ukraine's energy infrastructure with a massive overnight drone and missile attack on Thursday.