Explore the history of early Muslim expansion through a comprehensive documentary series covering the rise of the Rashidun caliphate and its initial conflicts with the Byzantine and Sassanid Empires. Delve into key campaigns led by Khalid ibn al-Walid and pivotal battles such as Yarmouk and al-Qadisiyyah. Follow the Muslim conquests across the Middle East, including the sieges of Ctesiphon and Jerusalem, the fall of Alexandria, and the Battle of Nahavand. Examine the Byzantine counteroffensive, the Muslim expansion into North Africa, and the internal conflicts that shaped the early caliphate, culminating in the rise of the Umayyad dynasty and their attempts to conquer Constantinople.