Wikipedia
Yamhad was an ancient Semitic kingdom centered on Ḥalab (Aleppo), Syria. The kingdom emerged at the end of the 19th century BC, and was ruled by the Yamhadite dynasty kings, who counted on both military and diplomacy to expand their realm. From the beginning of its establishment, the kingdom withstood the aggressions of its neighbors Mari, Qatna and Assyria, and was turned into the most powerful Syrian kingdom of its era through the actions of its king Yarim-Lim I. By the middle of the 18th century BC, most of Syria minus the south came under the authority of Yamhad, either as a direct possession or through vassalage, and for nearly a century and a half, Yamhad dominated northern, northwestern and eastern Syria, and had influence over small kingdoms in Mesopotamia at the borders of Elam. The kingdom was eventually destroyed by the Hittites, then annexed by Mitanni in the 16th century BC.
Yamhad's population was predominately Amorite, and had a typical Bronze Age Syrian culture. Yamhad was also inhabited by a substantial Hurrian population that settled in the kingdom, adding the influence of their culture. Yamhad controlled a wide trading network, being a gateway between the eastern Iranian plateau and the Aegean region in the west. Yamhad worshiped the traditional Northwest Semitic deities, and the capital Halab was considered a holy city among the other Syrian cities as a center of worship for Hadad, who was regarded as the main deity of northern Syria.