Kassites or Cassites (both: kăs´īts), ancient people, probably of Indo-European origin. They were first mentioned in historical texts as occupying the W Iranian plateau. In the 18th cent. BC they swept down on Babylonia, conquered the region, and ruled there until the 12th cent. BC, when they returned to the Iranian plateau. They remained more or less independent until the beginning of the Christian era, when they disappeared from history.
"Kassites." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (March 20, 2018). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/kassites
"Kassites." The Columbia Encyclopedia, 6th ed.. . Retrieved March 20, 2018 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/kassites