Tukulti-Ninurta I in Wikipedia
Tukulti-Ninurta I (meaning: "my trust is in [the warrior god] Ninurta"; reigned 1243–1207 BC) was a king of Assyria.
He succeeded Shalmaneser I, his father, as king and won a major victory against the Hittites at the Battle of Nihriya in the first half of his reign. Tukulti-Ninurta I later defeated Kashtiliash IV, the Kassite king and captured the rival city of Babylon to ensure full Assyrian supremacy over Mesopotamia. Kashtiliash IV was captured and deported to Assyria. After a rebellion in Babylon, he plundered Babylon's temples, and later began to build a new city, Kar-Tukulti-Ninurta. However, his sons rebelled against him and besieged him in his new city. During the siege, he was murdered. One of them, Ashur-nadin-apli, would succeed him on the throne.
After his death, the Assyrian Empire fell into decline. The Tukulti-Ninurta Epic describes the war between Tukulti-Ninurta I and Kashtiliash IV.