Game mechanics for rebuilding

[Adm.Lee]

Here's something that has flitted through my mind off and on for years. Has anyone devised in-game mechanics for rebuilding communities?

That hit me again tonight. Say you wanted to run a game in which the PCs have decided to settle in one village. Dobrodzien with B Troop, or somewhere in America. After they drive off whatever marauders you invent, then what?

Obviously, the GM could just write it up as story, but what feeds into that story?

Say the PCs survive in one village, and want to hook up with another one, and one after that. Say they take the role of King Julian I, and set themselves up to rule over a region. Any numbers or mechanics for that? How many militiamen they can recruit per 1,000 citizens? Possibilities for opposition? Politics?

Traveller seems to have had rules for everything at one point or another, has anyone seen anything over there? I've heard of Trav games where the PCs rise from tramp freighter to multiship corporations and nobles ruling a whole planet, is there something we could swipe from there?

Just curious.