The ancient history of Lorestan is closely intertwined
with the rest of the Ancient Near East. In the 3rd and
4th millennium BC, migrant tribes settled down in the
mountainous area of the Zagros Mountains. The
Kassites, an ancient people who spoke neither an
Indo-European nor a Semitic language, originated in
Lorestan. They would control Babylonia after the fall
of the Old Babylonian Empire ca. 1531 BC and until
ca. 1155 BC.
Parts of Luristan were invaded and settled by the
Iranian Medes in the 2nd millennium BC. The Medes
absorbed the indigenous inhabitants of the region,
primarily the Kassites as well as the Gutians, by the
time the area was conquered by the Persians in the
1st millennium BC.