Tarsus

Tarsus was an Aeldari maiden world, later destroyed and classed as a dead world. No segmentum, system, or coordinates are recorded for it.

It was the site of a meeting between the Farseer Eldrad Ulthran and the Primarch Fulgrim during the Great Crusade, in which Eldrad warned Fulgrim of Horus’s treachery and attempted to have him killed. Accounts differ on the engagement’s end: one holds that Eldrad’s force withdrew before Fulgrim virus-bombed several maiden worlds; another that the Imperials won the fight and virus bombs were then ordered against the newly found worlds; a third that Fulgrim virus-bombed Tarsus itself afterwards; and a fourth that virus bombs fell on the world before the Primarch could be killed.