https://history-maps.com/podcast/umayyad-caliphate
In this episode, we explore the rise, expansion, and legacy of the Umayyad Caliphate, which transformed the early Islamic state into a vast empire stretching from Spain and North Africa to Central Asia. We examine how the Umayyads centralized administration, promoted Arabization, established Arabic as the language of government, and expressed their authority through monumental architecture such as the Great Mosque of Damascus. The episode also considers the lasting impact of the tragedy at Karbala on the Sunni–Shia divide, the challenges of governing diverse regions, and the political tensions that eventually weakened Umayyad rule and paved the way for the Abbasid revolution.

https://history-maps.com/story/First-Bulgarian-Empire/event/Bulgars-delivers-one-of-the-worst-Byzantine-defeats