Yeah but armies of say, the Gallic tribes weren't so neatly divided into contingents like Hellenistic or Roman armies were. We don't have army lists such as 1,000 Belgae infantry and 400 heavy cavalry, or 20,000 spearmen and 5,000 swordsmen etc. With Hellenistic armies we have somewhat specific compositions of armies for certain battles, same with the Romans. I was thinking the next battle would be Punic in nature perhaps. We can do some barb battles but they'll be limited to Telamon, Vosges, etc. Alot of battles like Alesia, Gergovia, some of the Dacian campaigns that I can't think of atm were siege battles (or involved siegeworks) which are too imbalanced for MP unless the attacker has an incredibly distinct advantage. Similarly, I wanted to include a Seleucid-Parthian battle but a quick search yielded no names of battles other than results such as the Seleucids were defeated near Ecbatana and lost Media and Persia to the Parthians and so on, certainly no basis for forming armies.

Invariably, a lot of these battles are going to feature Rome as a participant because we simply don't have accounts of the others. I may throw a siege concept out there eventually though. Numantia seems like it would be fun. Those Celtiberi were ferocious.