The death of Alexander the Great in Babylon in 323 BCE marked not just the end of one of history's most remarkable military careers, but the beginning of a turbulent period that would reshape the ancient world. As Alexander lay dying, reportedly unable to speak clearly enough to name a successor, his vast empire—stretching from Macedonia to India—faced an uncertain future. The question of succession would plague the Macedonian Empire for decades, ultimately leading to its fragmentation into several Hellenistic kingdoms, the largest and most enduring of which would be the Seleucid Empire.Alexander's generals, known to history as the Diadochi or "Successors," initially attempted to preserve the unity of the empire. At the Partition of Babylon immediately following Alexander's death, they agreed to rule collectively as regents for Alexander's posthumous son, Alexander IV, and his mentally disabled half-brother, Philip III Arrhidaeus. However, this arrangement was doomed from the start. The empire was simply too vast and diverse to be governed effectively by committee, and the ambitions of individual commanders quickly overwhelmed any pretense of collective rule.