So, I am reading a few books on the Origins of writing and multiple books mention but don't elaborate on the importance of a mysterious "Sea Peoples" when referring to the fall of the Hittite Empire and the weakening of the Egyptian empire.

"But the Hittite Empire fell in 1180 bc, and Egypt's New Kingdom was considerably weakened soon thereafter, both due in part to widespread disturbance caused by the mysterious Sea Peoples" ~The Writing Revolution by Amalie E. Gnanadesikan