In the period of the Egyptian suzerainty over Palestine in the eighteenth dynasty Damascus (whose name frequently appears in the Tell el-Amarna tablets) was capital of the small province of Ubi. The name of the city in the Tell el-Amarna correspondence is Dimashka. Towards the end of that period the overrunning of Palestine and Syria by the Khabiri and Suti, the forerunners of the Aramaean immigration, changed the conditions, language and government of the country. One of the first indications of this change that has been traced is the appearance of the Aramaean Darmesek for Damascus in an inscription of Rameses III.

The growth of an independent kingdom with Damascus as centre must date from very early in the Aramaean occupation. It had reached such strength that though Tiglath-Pileser I. reduced the whole of northern Syria, and by the fame of his victories induced the king of Egypt to send him presents, yet he did not venture to attack Kadesh and Damascus, so that this kingdom acted as a "buffer" between the king of Assyria and the rising kingdom of Saul.

Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 9 — Part 150

David, however, after his accession made an expedition against Damascus as a reprisal for the assistance the city had given his enemy Hadadezer, king of Zobah. The expedition was successful; David smote of the Syrians 22,000 men, and took and garrisoned the city; "and the Syrians became servants to David, and brought gifts" (2 Sam. viii. 5, 6; 1 Chron. xviii. 5). This statement, it should be noticed, has been questioned by some modern historical and textual critics, who believe that "Syria" (Hebrew _Aram_) is here a corruption for "Edom." There is no other evidence--save the corrupt passage, 2 Sam. xxiv. 6, where "Tahtim-hodshi" is explained as meaning "the land of the Hittites to Kadesh"--that David's kingdom was so far extended northward. However this may be, it is evident that the Israelite possession of Syria did not last long. A subordinate of Hadadezer named Rezon (Rasun) succeeded in establishing himself in Damascus and in founding there a royal dynasty. Throughout the reign of Solomon (1 Kings xi. 23, 24) this Rezon seems to have been a constant enemy to the kingdom of Israel.

Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 9 — Part 150

It is inferred from 1 Kings xv. 19 that Abijah, son of Rehoboam, king of Judah, made a league with Tab-Rimmon of Damascus to assist him in his wars against Israel, and that afterwards Tab-Rimmon's son Ben-Hadad came to terms with the second successor of Jeroboam, Baasha. Asa, son of Abijah, followed his father's policy, and bought the aid of Syria, whereby he was enabled to destroy the border fort that Baasha had erected (1 Kings xv. 22).

Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 9 — Part 150