Garrison promotion - any district? all types and allegiance?

[Falrinth]

It says "+10 str when occupying a district or fort". Yet while im occupying enemy industrial district (not pillaged) and just promoted unit to have garrison buff, it's str didnt changed.

[Martin]

Enemy district.. not quite the same.. buff is for friendly ie allied or home, although tbh I don't know if it actually works on allied. Although healing does.

[Duck from State Farm]

Regardless if my archer/Ranged unit is in friendly or enemy districts I still pick the Garrison promotion to make my way down to the next promotion which does more damage to city walls.

[tempest.of.emptiness]

You'll only see the +10 strength in the actual combat preview, as a bonus to your unit's strength. Or, I assume you'll see it there. I haven't actually looked for it, now that I think about it...but it should be there (when it applies).