During the
Sasanian era (224–651 CE), the Mughan Plain was part of a strategic border region. Fortified cities like Ultan Qalasi and elevated mounds such as Nader Tepesi reveal advanced settlement structures, including irrigation systems and citadel-like layouts. These reflect a well-organized administrative presence in the region. The Sasanian Empire used the Mughan Plain as a route for military and economic operations, and remnants of coinage, pottery, and civic planning illustrate the integration of the area into broader imperial networks. == History ==