What is virtually unknown to many is that all ancient world chronology, especially before 610 B.C.E., actually stands upon the shoulders of one of the most famous Greek dates for the Trojan War!
Additionally, the oversight in adequately evaluating the evidence for dynasty stacking in ancient pagan sources has significantly contributed to the challenges in establishing Egyptian chronology and its repercussions on Israelite chronology. Notably, the ancient practice of superimposing one dynasty line upon another did not escape the attention of ancient commentators.
Eusebius
To demonstrate, Eusebius (early 4th century C.E.), while discussing the list of Egyptian dynasties as they were arranged by the 3rd century B.C.E. Egyptian priest Manetho—a list which is used until this day as a guide for the chronology of the ancient Egyptian monarchs—expressed his suspicions when he commented:
Yet if the number of years is still in excess, it must be supposed that perhaps several Egyptian kings ruled at one and the same time; FOR THEY SAY THAT THE RULERS WERE KINGS OF THINITAS (TJENU),1 OF MEMPHIS, OF SAIS, OF ETHIOPIA, AND OF OTHER PLACES AT THE SAME TIME. It seems, moreover, that different kings held sway in different regions, and that each dynasty was confined to its own nome (province): thus it was not a succession of kings occupying the throne one after the other, but several kings reigning at the same time in different regions. Hence arose the great total number of years.2