
The historic Philistines were a people who occupied the southern coast of Canaan at the beginning of the Iron Age (circa 1175 BC). According to the Bible, they ruled the five city-states (the "Philistine Pentapolis") of Gaza, Askelon, Ashdod, Ekron and Gath, from the Wadi Gaza in the south to the Yarqon River in the north, but with no fixed border to the east. The Bible paints them as Israel's most dangerous enemy. Their total population after the arrival of immigrants was around 25,000 in the 12th century BC (immediately after the migration), rising to a peak of 30,000 in the 11th century BC; the Aegean element was not more than half the total, and perhaps much less.
Ramses III defeating the Sea People

The Hittite and Mycenaean cultures collapsed at the same time, and various people from that area invaded Egypt, where they were called the Sea Peoples - the Philistines, the Lycians, and the Achaeans, among others (possibly the Trojans). Egypt beat these Sea Peoples off, but Egypt collapsed soon afterward anyway.