Why do we need this?
For example, the group SPQR (Stands for Senatus Populusque Romanus which translates to Senate and People of Rome.) has got legions in it. There are many legions (III,IV,VI,XIII,XV,XX,XXI) and they have their own groups where they sell uniforms. This is to be more organized generally. SPQR is the main group, we want to advertise it with using legions money but the thing is, we can’t do it with the help of other groups.
I think this feature will change the way how war groups work in a good way and expand the possibilities of how groups interact relationship based…
Also, having enemies will atleast mean something economically, they can tax or tribute other groups.