Velikovsky's Historical Sources

Although Velikovsky had planned only two books in the Ages In Chaos series, the
volume of material and amount of detail involved compelled him to expand it to
three and, subsequently, even more.  The period of time covered by the series
was, in terms of conventional chronology, the centuries from the end of Egypt's
Middle Kingdom (ca. 1550 BC) to the advent of Alexander the Great ca. 350 BC.

The first book, From the Exodus to King Akhnaton of Egypt, reconstructed the chronology of the earlier part of the period, and indicated a need to  remove something like 500 years from |Egyptian history in order to bring it into alignment with Biblical history.  In Peoples of the Sea, Velikovsky turned to the other end of the period, the fifth and fourth centuries BC, and attempted to show how several centuries of Egyptian history could be deleted if the histories of certain pharaohs, recorded in Egyptian sources, could be equated with the histories of pharaohs of a period supposedly seven centuries later, recorded in Greek sources.  A major result of this proposed revision was to equate the 13th-Century (20th Dynasty) Pharaoh Ramses III and his successors, with the 4th-Century Pharaoh Nectanebo I and his successors.