Back in 2014, DARPA announced the launch of its Ground X-Vehicle Technology (GXV-T) program, an initiative designed to break through a single paradigm that has been weighing the military down in ground combat. That paradigm is the ever-escalating vendetta between tanks and anti-tank guns.
Artillery designers keep making bigger anti-tank guns, and in response the tank designers have to load them up with more and more armor, to the point where the M1A2 Abrams (the main battle tank of the US Army) now weighs a staggering 72 tons.
That’s nearly twice the weight of a semi-trailer loaded to its maximum legal capacity of 40 tons, and it makes the modern tank a real pain to deal with, from the build, maintenance and deployment, right through to the end use. They’re not what you’d call light-footed or agile, and their sheer bulk can damage or destroy roads or bridges that aren’t up to the task.
DARPA has thus been working on what comes next: smaller, lighter, more nimble vehicles that have tricks other than massive armor up their sleeve when it comes to surviving on the battlefield.