I apologize for the late reply. I was out of town this weekend.
I must have missed the race mapping in the campaign background, sorry. That sounds good. Did you map the D&D race to the racial geographic location or make the historical cultural inhabitants look like the D&D race or a mixture? Since this might not be entirely clear, as an example, when the PCs meet a dwarf, is he likely to be a beer swilling miner or culturally middle-eastern, just short and bearded?
A little of both. When I portray NPCs I take a mix of what is interesting about both the "classic" D&D race and the culture with which they are associated to produce a more interesting character. I am not terribly interested in real historical accuracy, and borrow heavily from fictional stereotypes and movies for character ideas.
The adventure looks like a lot of fun. Hope you stop by and tell us how the first session goes.
I haven't decide whether I want to post actual play sessions yet, because they would be full of spoilers. I ran the first session back in the beginning of October. I will be running the second session next weekend. After that, I will post the second adventure (which is already written).
BTW, do you have any recomendations on source literature?
I've been assembling the campaign material for a long time, so I no longer remember all my sources. For this pass, though, my primary sources have been:
1) Wikipedia, for basic chronology and "lists" of things (like legions).
2) Gibson's "Decline and Fall of the Roman Empire" for basic history, which also inspired the campaign name.
3) "Myths and Legends of Ancient Greece and Rome" by E.M. Berens for basic mythology.
All of the above are available online for free, the last two from the Gutenberg project.