For the character, see Sima Yan
Sima Yan is a non-playable Jin faction in Total War: Three Kingdoms. It starts the campaign in southern China, located in Danyang commandery. It exclusively exists in 291.
Unique Features[]
As Sima Yan isn't a playable faction, it doesn't have any unique units, buildings or features.
Starting Situation[]
Eight Princes (291)[]

291 - Sima Yan (green)
Sima Yan starts the Eight Princes campaign at peace in Danyang commandery. His options to expand are virtually non-existent, and he will most likely be turned into a vassal or annexed by one of the closest nearby major factions, either Sima Yue or Sima Ai, throughout the campaign.