They thought the Sea people were from western Anatolia. But they also thought they were from wider areas, and wider range for larger events.
They also thought the sea people were from the lost city of Atlantis, as told by Frank Joseph and other people.
The sea people were "raiders and a loose confederation of clans who troubled the lands of the Near East and Egypt during the final period of the Bronze Age."
The sea people movenment was one of the largest and important in history will change the face of ancient world.