The Arameans emerged in a region which was largely under the domination of the Middle Assyrian Empire (1365–1050 BC) and quickly posed a threat to the Assyrian polity which was largely located west of the Euphrates. In order to nullify this threat, Tiglath-Pileser I (1115–1077 BC) of Assyria performed many campaigns in Aramean territory, although the numerous campaigns that the Assyrian records recorded that he took indicate that Assyrian military campaigns were unsuccessful at exercising power or dominance over the Arameans. Some scholars believe that the Arameans took Nineveh in this time. In the 11th century BC, Assyria fell into decline which may have been caused by the incursions of the emerging Arameans, allowing the Arameans to establish a string of states across the Levant and make notable expansions into Assyrian territory in this time such as in the Khabur Valley. During the period 1050 – 900 BC Arameans came to dominate most of what is now Syria but was then called Eber-Nari and Aramea.