I've thought in expanding Magna Terra to the past, about to the time Judea and Chaldeans go to war.
However, I didn't do it before as there are few countries and there is a lot of time between big changes, so if you start at that date, you can have a huge empire when in reality the maps barely changed. Also, the game can't allow for something as the greek citystates winning against the Achaemid Empire, that's why MT starts at Gaugamela, when the empires are balanced.
I'm more interested into expanding now MT into the future, maybe sometime I can do it back, but I doubt it for now