From wikipedia:

The Gawri Wall (Kurdish: دیواری گەوری‎) was a defensive fortification built and in use between the 4th and 6th centuries during the rule of the Sasanians and Parthians. The structure's ruins, which run the length of around 71 miles (114 kilometres), are located in Sarpol-e Zahab County near the Iran–Iraq border.
https://en.wikipedia.org/wiki/Gawri_Wall

Map: https://www.cambridge.org/core/journ...4C/core-reader