source: Star Trek
location: Outer Space
threat assessment: 4. It's bad enough to have to shoot helpless humans who have been borged, but imagine having to fight toddlers with cybernetics. It's not too outrageous as a matter of technology. Borg can boost the knowledge and intelligence of the toddlers with simple implants. Others help with their issues with balance and walking. From there you have mighty tiny warriors.
limitation: "I am Locutious of Borg, change me!"