Dhulqarnain And The Wall Built For Gog Magog
The history doesn’t claim to record everything thing. Cyrus may have been zulqarnain. The wall he built in some region of Gog and Magog is most likely vanished over time.some scholars did research on these events. You may consult the Tafser Turjuman ul Qur’an by Abu Al Kalam Azad and Qasas ul Qur’an by Hifzur Rehman Sewharavi.