Have you noticed that ever since I did my n00bish forum battle armies are referred to now as factions. This bugs me as
1 - I appear to have started a trend.
2 - I only meant it for small armies, 15 average number of troops
Faction typically refers to a combined political party, group of people, and military of some sort -- or representatives (diplomatic or military) thereof. So, faction is a pretty good word for this sort of thing.