If we may believe Greek tradition, Tiglath-Pileser II began life as a gardener. Whatever might have been his origin, however, he proved to be a capable ruler, a good general, and a far-sighted administrator. He was the founder of the second Assyrian Empire, which differed essentially from the first. The first empire was at best a loosely-connected military organization; campaigns were made into distant countries for the sake of plunder and tribute, but little effort was made to retain the districts that had been conquered. Almost as soon as the Assyrian armies were out of sight, the conquered nations shook off the Assyrian yoke, and it was only in regions bordering on Assyria that garrisons were left by the Assyrian king. And whenever the Assyrian throne was occupied by a weak or unwarlike prince, even these were soon destroyed or forced to retreat homewards. Tiglath-Pileser II, however, consolidated and organised the conquests he made; turbulent populations were deported from their old homes, and the empire was divided into satrapies or provinces, each of which paid a fixed annual tribute to the imperial exchequer. For the first time in history the principle of centralisation was carried out on a large scale, and a bureaucracy began to take the place of the old feudal nobility of Assyria. But the second Assyrian Empire was not only an organised and bureaucratic one, it was also commercial. In carrying out his schemes of conquest Tiglath-Pileser II was influenced by considerations of trade. His chief object was to divert the commerce of Western Asia into Assyrian hands. For this purpose every effort was made to unite Babylonia with Assyria, to overthrow the Hittites of Carchemish, who held the trade of Asia Minor, as well as the high road to the west, and to render Syria and the Phœnician cities tributary. The policy inaugurated by Tiglath-Pileser was successfully followed up by his successors.

Babylonia was the first to feel the results of the change of dynasty at Nineveh. The northern part of it was annexed to Assyria, and secured by a chain of fortresses. Tiglath-Pileser now attacked the Kurdish tribes, who were constantly harassing the eastern frontier of the kingdom, and chastised them severely, the Assyrian army forcing its way through the fastnesses of the Kurdish mountains into the very heart of Media. But Ararat, or Armenia, was still a dangerous neighbour, and accordingly Tiglath-Pileser's next campaign was against a confederacy of the nations of the north headed by Sarduris of Van. The confederacy was utterly defeated in Kommagênê, 72,950 prisoners falling into the hands of the Assyrians, and the way was opened into Syria. In b.c. 742 the siege of Arpad (now Tel Erfâd) began, and lasted two years. Its fall brought with it the submission of Northern Syria, and it was next the turn of Hamath to be attacked. Hamath was in alliance with Uzziah of Judah, and its king Eniel may have been of Jewish extraction. But the alliance availed nothing. Hamath was taken by storm, part of its population transported to Armenia, and their places taken by colonists from distant provinces of the empire, while nineteen of the districts belonging to it were annexed to Assyria. The kings of Syria now flocked to render homage and offer tribute to the Assyrian conqueror. Among them we read the names of Menahem of Samaria, Rezon of Syria, Hiram of Tyre, and Pisiris of Carchemish. This was the occasion when, as we learn from 2 Kings xv. 19, Menahem gave a thousand talents of silver to the Assyrian king Pul, the name under which Tiglath-Pileser continued to be known in Babylonia, and, as the Old Testament informs us, in Palestine also.

Three years later Ararat was again invaded. Van, the capital, was blockaded, and though it successfully resisted the Assyrians, the country was devastated far and near for a space of 450 miles. It was long before the Armenians recovered from the blow, and for the next century they ceased to be formidable to Assyria. Tiglath-Pileser's northern frontier was now secure, and he therefore gladly seized the opportunity of interfering in the affairs of the west which was offered him by Ahaz, the Jewish king. Ahaz, whom the Assyrian inscriptions call Jehoahaz, had been hard pressed by Rezon of Damascus and Pekah of Israel, who had combined to overthrow the Davidic dynasty and place a vassal prince, 'the son of Tabeal,' on the throne of Jerusalem. Ahaz in his extremity called in the aid of Tiglath-Pileser, offering him a heavy bribe and acknowledging his supremacy. Tiglath-Pileser accordingly marched into Syria; Rezon was utterly defeated in battle and then besieged in Damascus, to which he had escaped. Damascus was closely invested; the trees in its neighbourhood were cut down; the districts dependent on it were ravaged, and forces were despatched to punish the Israelites, Ammonites, Moabites, and Philistines, who had been the allies of Rezon, Gilead and Abel-beth-maachah being burnt, and the tribes beyond the Jordan carried into captivity. The Philistine cities were compelled to open their gates; the king of Ashkelon committed suicide in order not to fall into the hands of the enemy, and Khanun of Gaza fled to Egypt. At last in b.c. 732, after a siege of two years, Damascus was forced by famine to surrender. Rezon was slain, Damascus given over to plunder and ruin, and its inhabitants transported to Kir. Syria became an Assyrian province, and all its princes were summoned to do homage to the conqueror, while Tyre was fined 150 talents of gold, or about £400,000. Among the princes who attended the levée or 'durbar' was Ahaz, and it was while he was attending it that he saw the altar of which he sent a pattern to Urijah the priest (2 Kings xvi. 10).

All that now remained for Tiglath-Pileser to do was to reduce Babylonia as he had reduced Syria. In b.c. 731, accordingly, he marched again into Chaldæa. Ukin-ziru, the Babylonian king, was slain, Babylon and other great cities were taken, and in b.c. 729, under his original name of Pul, Tiglath-Pileser assumed the title of 'king of Sumer (Shinar) and Accad.'

He lived only two years after this, and died in b.c. 727, when the crown was seized by Elulæos of Tinu, who took the name of Shalmaneser IV. Shalmaneser's short reign was signalised by an unsuccessful attempt to capture Tyre, and by the beginning of a war against the kingdom of Israel. But the siege of Samaria was hardly commenced when Shalmaneser died, or was murdered, in b.c. 722, and was succeeded by another usurper who assumed the name of Sargon, one of the most famous of the early Babylonian kings. Sargon in his inscriptions claims royal descent, but the claim was probably without foundation. He proved to be an able general, though his inscriptions show that he continued to the last to be a rough but energetic soldier who had perhaps risen from the ranks.

Two years after his accession (b.c. 720) Samaria was taken and placed under an Assyrian governor, 27,280 of its leading inhabitants being carried captive to Gozan and Media. But Sargon soon found that the task of cementing and completing the empire founded by Tiglath-Pileser was by no means an easy one. Babylonia had broken away from Assyria on the news of Shalmaneser's death, and had submitted itself to Merodach-Baladan the hereditary chieftain of Beth-Yagina in the marshes on the coast of the Persian Gulf. The southern portion of Sargon's dominions was threatened by the ancient and powerful kingdom of Elam; the Kurdish tribes on the east renewed their depredations; while the Hittite kingdom of Carchemish still remained unsubdued, and the Syrian conquests could with difficulty be retained. In fact, a new enemy appeared in this part of the empire in the shape of Egypt.

Sargon's first act, therefore, was to drive the Elamites back to their own country with considerable loss. He was then recalled to the west by the revolt of Hamath, where Yahu-bihdi, or Ilu-bihdi, whose name perhaps indicates his Jewish parentage, had proclaimed himself king, and persuaded Arpad, Damascus, Samaria, and other cities to follow his standard. But the revolt was of short duration. Hamath was burnt, 4,300 Assyrians being sent to occupy its ruins, and Yahu-bihdi was flayed alive. Sargon next marched along the sea-coast to the cities of the Philistines. There the Egyptian army was routed at Raphia, and its ally, Khanun of Gaza, taken captive.

In b.c. 717 all was ready for dealing the final blow at the Hittite power in Northern Syria. The rich trading city of Carchemish was stormed, its last king, Pisiris, fell into the hands of the Assyrians, and his Moschian allies were forced to retreat to the north. The plunder of Carchemish brought eleven talents and thirty manehs of gold and 2,100 talents of silver into the treasury of Calah. It was henceforth placed under an Assyrian satrap, who thus held in his hands the key of the high road and the caravan trade between Eastern and Western Asia.

But Sargon was not allowed to retain possession of Carchemish without a struggle. Its Hittite inhabitants found avengers in the allied populations of the north, in Meshech and Tubal, in Ararat and Minni. The struggle lasted for six years, but in the end Sargon prevailed. Van submitted, its king Ursa, the leader of the coalition against Assyria, committed suicide, Cilicia and the Tibareni or Tubal were placed under an Assyrian governor, and the city of Malatiyeh was razed to the ground. In b.c. 711, Sargon was at length free to turn his attention to the west. Here affairs wore a threatening aspect. Merodach-Baladan, foreseeing that his own turn would come as soon as Sargon had firmly established his power in Northern Syria, had despatched ambassadors to the Mediterranean states, urging them to combine with him against the common foe. We read in the Bible of the arrival of the Babylonian embassy in Jerusalem, and of the rebuke received by Hezekiah for his vainglory in displaying to the strangers the resources of his kingdom. In spite of Isaiah's warning, Hezekiah listened to the persuasions of the Babylonian envoys, and encouraged by the promise of Egyptian support along with Phœnicia, Moab, Edom, and the Philistines, determined to defy the Assyrian king.

But before the confederates were ready to act in concert Sargon descended upon Palestine. Phœnicia and Judah were overrun, Jerusalem was captured, and Ashdod burnt, while the Egyptians made no attempt to help their friends. This siege of Ashdod is the only occasion on which the name of Sargon occurs in the Bible (Isaiah xx. 1). As soon as all source of danger was removed in the west Sargon hurled his forces against Babylonia. Merodach-Baladan had made every preparation to meet the coming attack, and the Elamite king had engaged to help him. But the Elamites were again compelled to fly before the warriors of Assyria, and Sargon entered Babylon in triumph (b.c. 710). The following year he pursued Merodach-Baladan to his ancestral stronghold in the marshes; Beth-Yagina was taken by storm, and its unfortunate defenders were sent in chains to Nineveh. Sargon was now at the height of his power. His empire was a compact and consolidated whole, reaching from the Mediterranean on the west to the mountains of Elam on the east, and his solemn coronation at Babylon gave a title to his claim to be the legitimate successor of the ancient Sargon of Accad. The old kingdoms of Elam and Egypt alone remained to threaten the newly-founded empire, which received the voluntary homage of the smaller states that lay immediately beyond it. Thus the sacred island of Dilvun in the Persian Gulf submitted itself to the terrible conqueror, and the Phœnicians of Kition or Chittim in Cyprus erected a monumental record of his supremacy.