Something one of my history teachers used to go on about. I’m not sure I can do him justice now that I’m thinking about it. Big military upsets due to superior intel. Sometimes by new means. I’m wondering now if he was paraphrasing Napoleon (the secret of war lies in the communications).
Roman roads, pigeons, semaphore, radio, all used to project military power in profound and overwhelming ways. Radar, sonar (if you’re willing to stretch the definition a little). CDMA (invented by Hedy Lamarr during WWII for torpedos, but not used until the Cuban missile crisis). Cryptanalysis to defeat the Germans. ARPAnet was built to be literally bomb proof.