Super-soldiers could be selected for specific duties on the basis of their genetic makeup and then constantly monitored for signs of weakness, says a report by the US National Academies of Science.

If a soldier is struggling, a digital “buddy” might step in and warn them about nearby threats, or advise comrades to zap them with an electromagnet to increase their alertness. If the whole unit is falling apart, biosensors could warn central commanders to send in a replacement team.