Alexander had an unexpected entry into Cilicia in 333 BC through the Cilician Gates and appointed the Syennesis dynasty to re-administer the region. His death in 323 BC marked the beginning of the Hellenistic era, as Greek replaced Luwian as the language of the region. After a short time under the Ptolemaic dominion, Seleucid Empire took control of the region in 312 BC. Adanan locals had adopted a Greek name for the city, Antioch on Sarus, to demonstrate loyalty to the Seleucid dynasty. The adopted name and the motifs illustrating the personification of the city seated above the river-god of Sarus on city's minted coins, reveal appreciation to the rivers which were strong part of the Cilician identity. Although the Adana area were into international trade, coasts of rugged Cilicia were under the heavy plunder of the Cilician pirates. Seleucids ruled Adana for more than two centuries until weakened by the civil war which led them to offer allegiance to Tigranes II, the King of Armenia who conquered a vast region in the Levant. Cilicia became a vassal state of the Kingdom of Armenia in 83 BC and new settlements were founded by Armenians in the region.