“I brought about the defeat of his armies, his warriors I overthrew. In the midst of [during] that battle my hand captured Kashtiliash, the Kassite king. I trod [stood] on
his royal neck with my feet like a footstool. I brought him stripped and bound before
Ashur my lord. Sumer and Akkad to its farthest border I brought under my sway
[control]. On the lower sea of the rising sun I established the frontier [border] of
my land.”
—Tukulti-Ninurta I, Assyrian king, as quoted in Cultural Atlas of Mesopotamia and the
Ancient Near East
According to this passage, who was Kashtiliash?