This expansion introduced several "life and death" mechanics that reflect the instability of the era:

The Empire Divided DLC serves as a grand-scale reimagining of the Roman Empire's near-collapse in 270 AD. Unlike the grand campaign, this setting focuses on a fractured world where the empire has split into three distinct rival factions, surrounded by opportunistic "barbarian" kingdoms and a rising Sassanid threat.

The heart of the campaign is the struggle for reunification between three Roman pretenders: