Launching weapons from within their territory forces adversaries to look not only outward but also inside for threats, one expert said.

Ukraine’s astonishing drone attack on military airfields and critical assets deep inside Russia on Sunday blindsided the Kremlin, destroyed at least a dozen strategic bombers and marked a seismic shift in modern warfare.

Ukraine's surprise attack on Russia has opened eyes. Small drones and artificial intelligence can outmaneuver large armies

Russia is advancing around Kostyantynivka and in the Sumy region with small, fast-moving units as both sides try a new tactic of using motorcycles and civilian cars to quickly cross open terrain.

For three years and more since Russian President Vladimir Putin’s imperial invasion of Ukraine ... tactics. Last weekend’s events also force us to look forward and understand that the new war ...