Which file/s determine the following aspects:
a) Lords faction.
Meant is to which faction a lord belongs.
b) Town/castle/village ownership.
Meant is to which faction the settlements belong.
These questions for the start setting (of sandbox play).
Background
I would like to make a mere historical setting along the title "Viking Conquest" ( not what the sandbox game balance suggests, a "Mercian Conquest" *

).
For me, this means that: (for the sake of modding/effect simplicity)
- East-Engle lords mainly belong to Danmark (except Eadmund, its king).
- East-Engle settlements belong to Danmark (except Dunwic and its villages).
These changes are my current modding goals.
* or "Angle-Saxon Conquest". I would like to do a historical play along "The Great Heathen Army".
In VC game terms, also as for modding simplicity/effect, that at least means that Norse troops are bit stronger and Norse characters are consiberably stronger (did this already with troops.txt and it has a slight effect on the faction/battle outcomes). Knowing, that the game mechanics merely don't allow a setup with such a big invading heathen army, ie. up to ca. 1500 "Northumbrians" under Halfdan and ca. same number under Danish control within East-Engle. Just at 868 AD, historically East-Engle was already mere under Danish control, so the above change is imo. due to slightly allow what the game title suggests. At 869 AD, Eadmund of East-Engle died heroicly, and with this, East-Engle as Angle-controlled realm was no more.
Question remains for me in this regard: Has VC game engine script mechanics to let that happen, that to a certain date, a character dies? Alternatively, i hope i can provoke the quasi-distinction of East-Engle and Eadmund with the above described balance changes.
Possibly or potentially, such changes will hinder Mercia also to get an upper hand by the default game balance. Ideally, Northumbria and Danmark would remain allied during the game versus Mercia, until at least Mercia is halfed in its power aka lost half of its settlements to Northumbria and Danmark.
Btw., if a very capable VC modder is up to teamup with me to realise a "historical-play VC", please express so, that we can speak about such a modding project.
I personally am a veteran (retired) modder, but never was that in Warband (modded that years ago with TweakMB, but not more) and esp. not for VC, and have not anymore the will to go deep into coding etc., but just can make the modding design and would have fun in this role.