Self-driving convoys were born from a simple military calculus: the fewer people driving vehicles in convoys, the fewer people will die when those convoys get attacked. In 2004, as the Iraq war entered its second year, DARPA offered 1 million to the team of robotics engineers who could make a machine cross 150 miles of the Mojave desert. No team succeeded in the first year, and the furthest only covered 7 miles of desert, but five teams completed the course in 2005. Since then, driverless vehicles have taken the civilian world by storm, with autopilot a key Tesla feature and companies like Uber and Alphabet investing in their own autonomous people-carrying machines. So what happened to the military driverless convoys?