States and territories established in the 260s

mid-3rd century breakaway state from the Roman Empire

Arbāyistān ( [ʾrb]ystn; Middle Persian: Arbāyistān, Arāwastān, Arwāstān; Armenian: Arvastan) or Beth Arabaye (Syriac: Bēṯ ʿArbāyē) was a Sasanian province in Late Antiquity. Due to its situation and its road systems, the province was a source of income from commercial traffic, as well as a constant area of contention during the Roman–Persian Wars.