New technology has made war more deadly than ever before. Sensors and satellites have made it nearly impossible for soldiers to hide on the battlefield, and cheap weapons mean being caught often has fatal consequences. Adam Roberts, The Economist’s foreign editor, Shashank Joshi, our defence editor, and a panel of our correspondents unpack the biggest developments in warfare over the past decade. They discuss the way it’s transformed today’s battlefields and what it means for how wars are waged