Mr Rawles, thank you for the service you provide.
A comment on the dual ring village concept. If it is advanced as a defense tactic, I would urge remembering that the walled-town versus siegecraft dynamic is thousands of years old, and the survival of walled towns and cities is only possible if they are:
1. Provisioned to last longer than the besieging force, which is of course free to forage and be resupplied
2. Fireproof
3. Relieved by a friendly force from outside.
They are also utterly obsolete since the development of artillery bombardment, still more so since the airplane and missile. Sad but true.
IMHO, safety today must rely on:
1. Invisibility or insignificance to possible enemy
2. Effective surveillance of a wide perimeter
3. mobile defense force to engage potential enemy at a distance
War is not only Hell, but quite expensive!
Thanks again! – Ben F.