Very interesting; thanks for posting this. It’s the first time I can remember seeing a map presented so concisely. I wonder if there was some natural impetus behind this, what must have seemed so sudden to those invaded, far from the Sea Peoples’ original home. A famine year in the Balkans or the northern Black Sea steppe (it’s clear I don’t really know where they came from, just guessing); pushed out of their own land by people like the Scythians; a dynastic civil war?
When the sea people attacked Ancient Egypt they got their butt kicked—Even though they had iron weapons, and the Egyptians has bronze—they Egyptians could marshal large armies and fleets of ships. If you have inferior weapons—go with superior numbers and organization. One thing you got to give to the Egyptians—they were good at organization skills. They were also defending their homeland from invaders—that also gave them an edge. After this—Egypt went to Iron Weapons.