Perhaps if the Hilux had been invented in WW1 it would have been a prime candidate for military application. But these days the military has Humvees and tanks and so on. A Hilux is no match for cutting edge equipment else the US Army would not have developed more capable analogs.

Reference to http://www.newsweek.com/why-rebel-groups-love-toyota-hilux-7...

"Conventional" military is the least interesting cutting edge now; much the actual fighting of the present day is extremely cost-sensitive re-purposed civilian equipment.

Another example: https://www.cnbc.com/2018/01/11/swarm-of-armed-diy-drones-at...

The Toyota Hilulx is not autonomous...yet. There's still a human being holding the weapon.