The Mitanni kingdom is thought to have been a feudal state led by a warrior nobility of Indo-Aryan descent, who invaded the Levant region at some point during the 17th century BC, their influence apparent in a linguistic superstratum in Mitanni records. The spread to Syria of a distinct pottery type associated with the Kura-Araxes culture has been connected with this movement, although its date is somewhat too early. Yamhad was an ancient Amorite kingdom. A substantial Hurrian population also settled in the kingdom, and the Hurrian culture influenced the area. The kingdom was powerful during the Middle Bronze Age, c. 1800–1600 BC. Its biggest rival was Qatna further south. Yamhad was finally destroyed by the Hittites in the 16th century BC. The Aramaeans were a Semitic (West Semitic language group), semi-nomadic and pastoralist people who had lived in upper Mesopotamia and Syria. Aramaeans have never had a unified empire; they were divided into independent kingdoms all across the Near East. Yet to these Aramaeans befell the privilege of imposing their language and culture upon the entire Near East and beyond, fostered in part by the mass relocations enacted by successive empires, including the Assyrians and Babylonians. Scholars even have used the term 'Aramaization' for the Assyro-Babylonian peoples' languages and cultures, that have become Aramaic-speaking. The Sea peoples is the term used for a confederacy of seafaring raiders of the second millennium BC who sailed into the eastern shores of the Mediterranean, caused political unrest, and attempted to enter or control Egyptian territory during the late 19th dynasty, and especially during Year 8 of Ramesses III of the 20th Dynasty. The Egyptian Pharaoh Merneptah explicitly refers to them by the term "the foreign-countries (or 'peoples') of the sea" in his Great Karnak Inscription. Although some scholars believe that they "invaded" Cyprus, Hatti and the Levant, this hypothesis is disputed. The "Bronze Age collapse" is the name given by those historians who see the transition from the Late Bronze Age to the Early Iron Age as violent, sudden and culturally disruptive, expressed by the collapse of palace economies of the Aegean and Anatolia, which were replaced after a hiatus by the isolated village cultures of the Dark Age period in history of the ancient Middle East. Some have gone so far as to call the catalyst that ended the Bronze Age a "catastrophe".