Arpad was a city of ancient Syria. In 743 BCE, Assyrian king Tiglath-pileser III led a military expedition to Syria, defeating there an army of Urartu. But the city of Arpad, which had formed an alliance with Urartu, did not surrender easily. It took Tiglath-pileser three years of siege to conquer Arpad, whereupon he massacred its inhabitants and destroyed the city.
In B.C. 1120 Tiglath-pileser I., the greatest of the Assyrian kings, "crossed the Euphrates, defeated the kings of the Hittites, captured the city of Carchemish, and advanced as far as the shores of the Mediterranean." He may be regarded as the founder of the first Assyrian empire.
He directed his armies into Syria, which had by this time regained its independence, and took (B.C. Arpad, near Aleppo, after a siege of three years, and reduced Hamath.
Azariah (Uzziah) was an ally of the king of Hamath, and thus was compelled by Tiglath-pileser to do him homage and pay a yearly tribute.
SYRIA, the name given generally to the land lying between the easternmost shore of the Levantine Gulf and a natural inland boundary formed in part by the Middle Euphrates and in part by the western edge of the Hamad or desert steppe.
Syria happens to lie on the line of least resistance for communication between the early subtropic seats of civilization in the Nile and Euphrates valleys and the civilizations of Europe.
Geologically, Syria belongs to two distinct regions of the earth's crust, the northern and smaller portion lying within the great belt of folding of southern Europe and central Asia, and the southern and larger portion belonging to the Indo-African area, which, though often faulted, is usually free from crumpling.