Slitherine

I have modified the factions.csv and my new faction did show up in the map editor. I copied the shop_flag_de hud_unit_flag_de and faction_de files and renamed them according to my new faction. However, when I assign a unit to the new faction, the game crashed. The flags of my new faction are also a white flag in a game. Is there anything I am missing? Thanks in advance.

Quick update here. I have found a way to add a new faction by editing the faction.csv and cook the flag assets needed with unreal engine then place the files.
useful link here:viewtopic.php?p=912406&hilit=model#p912406

Seeing the "factions.csv" and unreal engine mentioned, I guess that this thread was intended for the Panzer Corps 2 forum instead?