NATION parameter in BG edit

[Brigz]

When editing the values of a BG in the Scenario Editor, what is the function of the "NATION" parameter? It only allows you to enter a number. What does this number signify?

[Brigz]

After looking extensively at XML sheets and user created scenarios I'm guessing that this has something to do with allied troops. Otherwise it seems to have no function at all. Anyone at Hexwar/Slitherine able to confirm this?

[Lupus]

I'm not exactly sure, but I guess that game engine uses this parameter for allied troops, e.g. Later Carthaginian with Bruttian allies: The Carthaginians would have Nation=1 and the Bruttians would have Nation=2, both on the same side. But this is only a guess, I never used it, because in no scenario I built I used allies.