Technology changes the shape of the battlefield, tactically and strategically. What is the War On Terror like? Is it a Big Gun duel or a carrier battle? I’d say it’s more like the Battle of the Atlantic, hidden submarines attacking defenseless targets when they can, running from the escorts when they’re found, and being sunk when caught. If that’s the better analogy, then what are the modern equivalents of:

On the money description JMH, thanks. I would have typed “excellent” but some buddy beat me to it.
(useful)
-Sonar…cell phones
-Radar…drones
-Jeep Carriers…B-52′s
-cheap, but effective and numerous, Destroyer Escorts…Sons of Iraq, AFA
-Hunter-Killer Task Forces…Special ops a la Yemen and Somalia. Perhaps the Israelis?
-Enigma intercepts…SWIFT (Money transfers system).