Maroccidens is basically the area south of the Zuma and the Root River.
I have taken to calling the region between the Via Mountains and Maroccidens by the name of Mesoccidens.
The area above that is just "Caerwyn."
I am glad that Maroccidens has caught on as a term; I'm hoping other terms catch on too.
With Asylon expanding to Koshtlom, Terran starting to stabilize after the post-colony shocks, and D'Hara resurgent, it'll still be a hard winter, but next summer should be very fun. I suspect that by next autumn, most of Mesoccidens will be settled by Terran and Asylon (assuming Caerwyn doesn't completely collapse into a mess of monsters and undead and the Zuma don't get feisty), while I have high hopes that Barca will be able to expand given how heavily invested in its success Terran and D'Hara are; and if Terran's north gets more and more stable, we should be able to help Barca more.