The most mature military systems using stigmergic principles – rated at TRL 8 – have been described and demonstrate conclusively that marker-based stigmergy ensures very good information fusion and processing in a battlefield scenario. Related work –referenced but not described – indicates that the systems evaluated are stable, can be effectively simulated and scale to large number of unmanned autonomous vehicles.To conclude, the body of work on swarm intelligence found in the literature and social insects observed in nature, indicate that robust, scalable and engineering solutions can be created. What remains is the problem of developing a detailed research agenda and then funding it.