Timeline of the Assyrian Empire in Ashur began deteriorating, Tukulti-Ninurta built a new capital city; Kar-Tukulti-Ninurta. He stretched the Assyrian Empire further south than before, conquering Dilmun, a "pre-Arab" civilisation of the Arabian Peninsula that encompassed modern Bahrain, Kuwait, Qatar and the coastal regions of the Eastern Province of Saudi Arabia. However, Tukulti-Ninurta's sons rebelled and besieged the ageing king in his capital. He was murdered and then succeeded by Ashur-nadin-apli (1206–1203 BC) who left the running of his empire to Assyrian regional governors such as Adad-bēl-gabbe. Another unstable period for Assyria followed, it was riven by periods of internal strife and the new king
Ancient history the 24th and 22nd centuries BC, following the conquests of king Sargon of Akkad. Because of the policies of the Akkadian Empire toward linguistic assimilation, Akkad also gave its name to the predominant Semitic dialect: the Akkadian language, reflecting use of "akkadû" ("in the language of Akkad") in the Old Babylonian period to denote the Semitic version of a Sumerian text. Assyria was originally (in the Middle Bronze Age) a region on the Upper Tigris, named for its original capital, the ancient city of Assur. Later, as a nation and empire that came to control all of the Fertile Crescent,