New Delhi, Nov. 6 -- The nature of war has always evolved with technology. From spears and swords to muskets, artillery, and aircraft, every leap in human ingenuity has reshaped the way nations wage conflict. But in the twenty-first century, the battlefield itself is undergoing a transformation far deeper than any before. Geography and terrain no longer define its boundaries. Wars are being fought in invisible domains, cyberspace, artificial intelligence, satellite constellations, autonomous systems, and secure communication networks. Control over these technological frontiers, rather than over pieces of land, increasingly determines victory or defeat.

The classical image of the warrior-leader, the officer charging ahead, sword or revolv...