War World is an offshoot of the Co-Dominium universe created by Jerry Pournelle. Situated in the backwater of Byer’s Star system, the major story arc begins when the system is cut off during the revolt of eugenically-bred (and some cyborg) super-soldiers. The system ultimately becomes their uncharted refuge, but needless to say, the population of Haven (the main world in the Byer’s Star system) aren’t pleased by this turn of events.
How did I get involved? Well, back in 1991, I had the good fortune of having a manuscript rejected by the wonderful, old-school editor John Carr. I say it was my good fortune to have my ms rejected, because John loved the story (even though it was too long for the anthology he was compiling at that time; Jerry Pournelle’s High Tech Wars).