What's a single word that means "group of branches"?

We have a system that allows users to group branches (stores/shops/outlets) of a company/franchise, but it has come to the attention of the team that not every English speaker may call them branches (although they’re what we call them, but the system is global).

We wish to use a single word to refer to the "group of branches", but we’re stumped.

To clarify, a group of branches is categorized by the users in however way they wish to categorize them, whether it is based by locations/shared preferences/properties, or anything in-between. For example, KFC may have a group with the following branches:

1. KFC in Country ABC City X Mall A (Food Court 1).
2. KFC in Country ABC City X Mall A (Food Court 3).
3. KFC in Country ABC City Z Block 123.
4. KFC in Country EFG City Y Block 456.

I’m providing the above example so that it is understood that the user is in control of grouping the branches, and there is no expected correlation that could help define the grouping (give the name). The only thing they have in common is the company/franchise that owns them.

One of my colleagues suggested "Area", while I suggested "Division". The antonyms of branch are "whole" and "company". I was calling for "division" as a branch may be a "subdivision". Otherwise there’s "aggregation", "collection", and "entity", which I didn’t like, because we use that terminology for other things (internally), and they might sound too complex/vague for the average user. I’m still not sure what to actually call it, and where to search for other systems that have it already figured out.