 The Arab conquest of Iran was a complex process orchestrated by the Rashidun Caliphs, a series of strategic campaigns set off by Prophet Muhammad's death aimed to enlarge the Islamic caliphate. The Arab forces faced the weakened Sasanian Persian Empire, grappling with internal issues and economic troubles. The key turning point was the Battle of Qadisiya, causing the collapse of the Sasanian capital, Qatessiphon. Please note, historical accounts are often imprecise and should be considered as approximations. This was a tumultuous period, the exact toll of which is difficult to gauge. The conquest brought significant changes, spreading Islam, introducing Arab rule and gradually blending Arab and Persian cultures, deeply influencing Iran's history and identity. Enjoy this journey through history, share your thoughts, tap that like button, and don't forget to subscribe for more fascinating insights.