From a technical standpoint, we could do this by having each admin create a protected area for each “city” using grief prevention, which could be manually color coded on the map.
Trust Perms could be set by each admin to let people join a faction (the factions plugin would be overkill and does not work alongside griefprevention)
We might be able to set a way to trigger the collapse of a protected area, I.e building a beacon at the center of the land gives control to the attacking faction, Not sure if this is possible, but could be a way to “control land”?

It would still have to work for new players to just jump in game and play normally.

Holding land for a certain amount of time to capture it is called “King of the hill”.
Ive been looking at setup for this plugin to award a “rank up” automatically based on stats recorded, it’s got its own King of the Hill trigger, so standing in a certain spot for a specific time I can set “rewards” of sorts, which includes sending server commands, so I could trnasfur that land to the capturing plater..

All these ideas are getting more and more complex, and working their way towards “Factions” Which in no way works alongside griefprevention and is super complex to setup and work and is really designed for massive servers.

There is other plugins to seperate an entire world into regions, But it would be good to work with griefprevention as it works so well, We can set triggers for certain events?