Hephthalite Empire
Historical knowledge about Sogdia is somewhat hazy during the period of the Parthian Empire (247 BC – 224 AD) in Persia. The subsequent Sasanian Empire of Persia conquered and incorporated Sogdia as a satrapy in 260, an inscription dating to the reign of Shapur I noting that its limits formed the northeastern Sasanian borderlands with the Kushan Empire. However, by the 5th century the region was captured by the rival Hephthalite Empire.