Abu Jafar al-Mansur vs John the Fearless

Al-Mansur eliminated rivals including his uncle Abd Allah ibn Ali and the Barmakids, securing Abbasid control. He established a centralized bureaucracy and suppressed rebellions, including the Rawandiyya uprising.

Abu Jafar al-Mansur founded the city of Baghdad as the new capital of the Abbasid Caliphate. The Round City was designed as a center of administration and culture, becoming one of the largest cities in the world.

Al-Mansur supported the translation of Greek philosophical and scientific texts into Arabic. This initiative laid the foundation for the Abbasid translation movement, which preserved and expanded classical knowledge.

John the Fearless, as Duke of Burgundy, led forces to crush a revolt in the Prince-Bishopric of Li

John the Fearless's Burgundian forces captured Paris from the Armagnacs, restoring his influence over the French royal court. This allowed him to control King Charles VI and dominate French politics until his assassination.

John the Fearless was assassinated by followers of the Dauphin Charles during a parley on the bridge of Montereau. His death escalated the Armagnac-Burgundian civil war and led to the Burgundian alliance with the English in the Hundred Years' War.

Although signed after his death, John the Fearless's alliance with the English paved the way for the Treaty of Troyes, which recognized Henry V as heir to the French throne. His assassination had made the Burgundian-English alliance possible.