Map of Assyrian Conquests

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Map of the Expansion of the Assyrians

Ezekiel 31:3 - Behold, the Assyrian [was] a cedar in Lebanon with fair branches, and with a shadowing shroud, and of an high stature; and his top was among the thick boughs.

Assyria in the Bible Encyclopedia - ISBE

X. Government and Army.
Assyria was a military kingdom which, like the Northern Kingdom of Israel, had established itself by a successful revolt from Babylonia. In contradistinction to Babylonia, which was a theocratic state, the king being subordinate to the priest, the Assyrian king was supreme. Whereas in Babylonia the temple was the chief public building, in Assyria the royal palace dominated everything, the temple being merely a royal chapel attached to the palace. The king, in fact, was the commander of an army, and this army was the Assyrian people. How far the whole male population was liable to conscription is still uncertain; but the fact that the wars of Assur-bani-pal so exhausted the fighting strength of the nation as to render it unable to resist the invaders from the North shows that the majority of the males must have been soldiers. Hence the constant wars partly to occupy the army and prevent revolts, partly for the sake of booty with which to pay it. Hence too, the military revolutions, which, as in the kingdom of Israel, resulted in changes of dynasty and the seizure of the throne by successful generals. The turtannu or commander-in-chief, who took the place of the king when the latter was unable or unwilling to lead his forces, ranked next to the sovereign. From the reign of Tiglath-pileser IV onward, however, the autocracy was tempered by a centralized bureaucracy, and in the provinces a civil governor was appointed by the side of the military commander. Among the high officials at court were the rab-saki or "vizier," and the rab-sa-risi or "controller," the rabhcaric (RAB-SARIS (which see)) of the Old Testament.
The army consisted of cavalry, infantry, bowmen and slingers, as well as of a corps of charioteers. After the rise of the Second Empire the cavalry were increased at the expense of the chariotry, and were provided with saddles and boots, while the unarmed groom who had run by the side of the horse became a mounted archer. Sennacherib further clothed the horseman in a coat of mail. The infantry were about ten times as numerous as the calvary, and under Sargon were divided into bowmen and spearmen, the bowmen again being subdivided into heavy-armed and light-armed, the latter being apparently of foreign origin. Sennacherib introduced a corps of slingers, clad in helmet and cuirass, leather drawers and boots. He also deprived the heavy-armed bowmen of the long robes they used to wear, and established a body of pioneers with double-headed axes, helmets and buskins. Shields were also worn by all classes of soldiers, and the army carried with it standards, tents, battering-rams and baggage-carts. The royal sleeping-tent was accompanied by tents for cooking and dining. No pains, in fact, were spared to make the army both in equipment and discipline an irresistible engine of war. The terror it excited in western Asia is therefore easily intelligible (Isa 10:5-14; Nah 2:11-13; 3:1-4).  Full Article

Assyria from Smith's Bible Dictionary

Assyria
5. History.--The Mesopotamian researches have rendered it apparent that the original seat of government was not at Nineveh, but at Kileh-Sherghat, on the right bank of the Tigris. The most remarkable monarch of the earlier kings was called Tiglath-pileser. He appears to have been king towards the close of the twelfth century, and thus to have been contemporary with Samuel. Afterwards followed Pul, who invaded Israel in the reign of Menahem 2Ki 15:29 about B.C. 770, and Shalmaneser who besieged Samaria three years, and destroyed the kingdom of Israel B.C. 721, himself or by his successor Sargon, who usurped the throne at that time. Under Sargon the empire was as great as at any former era, and Nineveh became a most beautiful city. Sargon's son Sennacherib became the most famous of the Assyrian kings. He began to reign 704 B.C. He invaded the kingdom of Judea in the reign of Hezekiah. He was followed by Esarhaddon, and he by a noted warrior and builder, Sardanapalus. In Scripture it is remarkable that we hear nothing of Assyria after the reign of Esarhaddon, and profane history is equally silent until the attacks began which brought about her downfall. The fall of Assyria, long previously prophesied by Isaiah, Isa 10:5-19 was effected by the growing strength and boldness of the Medes, about 625 B.C. The prophecies of Nahum and Zephaniah Zep 2:13-15 against Assyria were probably delivered shortly before the catastrophe.  Full Article

The Bible Mentions a lot Concerning the "Assyrians"

Isaiah 19:23 - In that day shall there be a highway out of Egypt to Assyria, and the Assyrian shall come into Egypt, and the Egyptian into Assyria, and the Egyptians shall serve with the Assyrians.

Ezekiel 23:9 - Wherefore I have delivered her into the hand of her lovers, into the hand of the Assyrians, upon whom she doted.

Hosea 5:13 - When Ephraim saw his sickness, and Judah [saw] his wound, then went Ephraim to the Assyrian, and sent to king Jareb: yet could he not heal you, nor cure you of your wound.

Micah 5:6 - And they shall waste the land of Assyria with the sword, and the land of Nimrod in the entrances thereof: thus shall he deliver [us] from the Assyrian, when he cometh into our land, and when he treadeth within our borders.

Isaiah 31:8 - Then shall the Assyrian fall with the sword, not of a mighty man; and the sword, not of a mean man, shall devour him: but he shall flee from the sword, and his young men shall be discomfited.

Isaiah 23:13 - Behold the land of the Chaldeans; this people was not, [till] the Assyrian founded it for them that dwell in the wilderness: they set up the towers thereof, they raised up the palaces thereof; [and] he brought it to ruin.

Isaiah 10:24 - Therefore thus saith the Lord GOD of hosts, O my people that dwellest in Zion, be not afraid of the Assyrian: he shall smite thee with a rod, and shall lift up his staff against thee, after the manner of Egypt.

Isaiah 10:5 - O Assyrian, the rod of mine anger, and the staff in their hand is mine indignation.

Hosea 11:5 - He shall not return into the land of Egypt, but the Assyrian shall be his king, because they refused to return.

Isaiah 14:25 - That I will break the Assyrian in my land, and upon my mountains tread him under foot: then shall his yoke depart from off them, and his burden depart from off their shoulders.

Ezekiel 31:3 - Behold, the Assyrian [was] a cedar in Lebanon with fair branches, and with a shadowing shroud, and of an high stature; and his top was among the thick boughs.

Isaiah 52:4 - For thus saith the Lord GOD, My people went down aforetime into Egypt to sojourn there; and the Assyrian oppressed them without cause.

Micah 5:5 - And this [man] shall be the peace, when the Assyrian shall come into our land: and when he shall tread in our palaces, then shall we raise against him seven shepherds, and eight principal men.

Isaiah 30:31 - For through the voice of the LORD shall the Assyrian be beaten down, [which] smote with a rod.

Ezekiel 16:28 - Thou hast played the whore also with the Assyrians, because thou wast unsatiable; yea, thou hast played the harlot with them, and yet couldest not be satisfied.

Isaiah 19:23 - In that day shall there be a highway out of Egypt to Assyria, and the Assyrian shall come into Egypt, and the Egyptian into Assyria, and the Egyptians shall serve with the Assyrians.

Hosea 12:1 - Ephraim feedeth on wind, and followeth after the east wind: he daily increaseth lies and desolation; and they do make a covenant with the Assyrians, and oil is carried into Egypt.

2 Kings 19:35 - And it came to pass that night, that the angel of the LORD went out, and smote in the camp of the Assyrians an hundred fourscore and five thousand: and when they arose early in the morning, behold, they [were] all dead corpses.

Isaiah 37:36 - Then the angel of the LORD went forth, and smote in the camp of the Assyrians a hundred and fourscore and five thousand: and when they arose early in the morning, behold, they [were] all dead corpses.

Ezekiel 23:23 - The Babylonians, and all the Chaldeans, Pekod, and Shoa, and Koa, [and] all the Assyrians with them: all of them desirable young men, captains and rulers, great lords and renowned, all of them riding upon horses.

Ezekiel 23:12 - She doted upon the Assyrians [her] neighbours, captains and rulers clothed most gorgeously, horsemen riding upon horses, all of them desirable young men.

Ezekiel 23:5 - And Aholah played the harlot when she was mine; and she doted on her lovers, on the Assyrians [her] neighbours,

Lamentations 5:6 - We have given the hand [to] the Egyptians, [and to] the Assyrians, to be satisfied with bread.