One nice thing about high tech is it makes physical disability less relevant to one ability to contribute in society. Or even in war.
For better or worse, war is going high tech. You don't have to be able to walk in order to push a button. Paraplegic? Give him an armor plated motorized wheelchair with gun mount. Quadriplegic? Put his brain in a jar and wire it up to a tank.
The next phase in the evolution of war: Daleks!