In the 1st century BCE, Trogus names – in the "Historiae Philppicae" (of which only the "Prologues" have survived intact) – three tribes involved in the conquest of Bactria: the Asiani, Sacaraucae and Tochari (i.e. the Tukhara of Bactria rather than the so-called Tocharians of the Tarim Basin). The Tochari are reported to have, at some point, become subject to the ruling elite of the Asiani. According to Trogus, the Sacaraucae had since been destroyed. (In about 200 CE, the Roman historian, Justin (Marcus Junianus Justinus), wrote an "epitome" or condensation of Trogus's history. The last datable event recorded by Justin is the recovery of the Roman standards captured by the Parthians in 20 BCE, although Trogus' original history may have dealt with events into the first decade of the 1st century CE.)