How Did the Ancient City of Nineveh Fall?
Among the major events in the ancient Near East, none were more earth-shattering than the fall of the ancient Assyrian city of Nineveh. The demise of Nineveh was so important because it marked the end of the Assyrian Empire, which at its height stretched from Egypt in the west to Persia in the east and included most of Anatolia, the Levant, and the Arabian Peninsula.
The Assyrians ruled their empire with an iron fist. In doing so, we're able to fleece their subject peoples of their precious minerals and resources, which they then used to build Nineveh and other cities in the Assyrian heartland. Eventually, the Assyrians' enemies grew tired of the malevolent regime and so came together temporarily to cast off the Assyrian yoke. The great city of Nineveh was destroyed in the process.
What was the impact of the Fall of Nineveh?
The destruction of Nineveh left such a strong impression on ancient peoples' psyche that it was written about for several subsequent centuries in the Babylonian cuneiform annals, the writings of Greek and Roman historians, and even in the Old Testament of the Bible. Nineveh’s fall was so important because, for a time, it was the greatest city in the ancient world as it served as a source of inspiration and awe for Assyrians and non-Assyrians alike throughout the region. The quality of the city’s temples and palaces were superb, and Nineveh boasted of one of the world’s first botanic gardens, which many scholars believe was the inspiration for the fabled “Hanging Gardens of Babylon.” 
But the details concerning how the city fell are as important to the city’s history as its great monuments. As great as Nineveh once was, it fell victim to a combination of internal problems within the Assyrian royal house and the ever-present and a large number of enemies the Assyrians managed to create during their brutal reign of terror over the Near East. In the end, the Assyrians’ enemies saw Nineveh as a symbol of their overlords, so they wiped it from the face of the earth.
What was the Assyrian Empire?
Nineveh was located in the middle of ancient Assyria, centered on the Tigris River in northern Mesopotamia in what would today be the northern part of Iraq. As part of the Fertile Crescent, much of Assyria had good soil that allowed a surplus in crops and exceptional population growth. Like many ancient cities, Nineveh was built on a mound for defense overlooking the Kosr River, which is a tributary of the Tigris River. Although much of Assyria was fertile cropland in ancient times, the area around Nineveh was exceptionally productive, making it an excellent location for a city.  For most of Assyrian history, the primary political capital was located in the city of Ashur. Still, Nineveh’s importance gradually grew until it eclipsed the older city.
Long before Nineveh became the Assyrian Empire's capital in the early first millennium BC, it was mentioned sporadically in various cuneiform historical texts. There were two notable mentions of the city in the late third millennium BC, the first being during the reign of the Akkadian King Manishutushu (ruled ca. 2269-2255 BC), who is believed to have built a temple to the Mesopotamian goddess of love and war, Ishtar, at Nineveh.  Nineveh was also mentioned in a text attributed to a king from the Third Dynasty of Ur, Shulgi (reigned ca. 2094-2047 BC), although the reference is short and lacks detail.  For over 2,000 years, Nineveh languished as a provincial backwater until the Assyrians invoked their will across the Near East and a particularly energetic king came to the throne.
How did Nineveh become the capital of the Assyrian Empire?
When Sennacherib (ruled 704-681 BC) assumed the Assyrian throne, he followed his predecessors' footsteps by leading his armies into battle and conquering more land for the Assyrian people. But Sennacherib was not content to be remembered as just another conquering Assyrian king. He desired to leave much more for posterity, so he relocated the Assyrian capital from Ashur Nineveh after his fifth military campaign.  Although a settlement already existed at Nineveh, Sennacherib transformed it from a minor religious center dedicated to Ishtar's premier city of the ancient world.
On the citadel that overlooked the Kosr River, Sennacherib had a palace built – known by modern scholars as the southwest palace to differentiate it from the northwest palace built by the Assyrian King Ashurbanipal (reigned 668-627 BC) – which he adorned with the many battle reliefs that are now housed in the British Museum in London, England. Next to the palaces stood the Assyrians' temples two most important deities, Ishtar and Nabu, the god of writing and knowledge.  The palaces and temples of Nineveh must have been an awe-inspiring sight for any visitor to see, but perhaps the most spectacular sight was the gardens of Sennacherib.
The gardens of Sennacherib were depicted in both pictorial reliefs and several texts. According to one text, the gardens were comprised of “every fruit-bearing tree . . . cypress and mulberry, all kinds of trees” that were home to “the birds of heaven, igiru birds . . . wild swine and beasts of the forests.”  Sennacherib built Nineveh into what was perhaps the greatest city in the world at the time and his successor Ashurbanipal certainly added to that legacy, but a spate of problems both within and outside of the Assyrian heartland manifested to bring the great city to a sudden end.
Why did Nineveh Fall?
The stable and effective reigns of Sennacherib and Ashurbanipal were followed by a short period of instability brought forth by court intrigues. Ashurbanipal’s successor was the little-documented Ashur-etel-ilani (ruled 627-623 BC), whose short reign led to a succession crisis in the Assyrian royal house. Important members of the nobility opposed Ashur-etel-ilani and eventually usurped the king in favor of a royal eunuch named Sin-shum-lishir (the years of his reign are imprecise).  The succession problems in the Assyrian royal house contributed to the decline of their empire and that of their capital city of Nineveh, but the final blow came from outside Assyria.
For centuries, the Assyrians could impose their will on the other peoples throughout the Near East through a combination of efficient brutality and superior battlefield tactics and technologies. Still, by the seventh century BC, their neighbors had caught up in most of those categories. In Babylon's ancient city, a new dynasty of ethnic Chaldeans came to power. Modern scholars know as the “Neo-Babylonian” Dynasty, and just to the east of Assyria in Persia, the Kingdom of the Medes was adding pressure. The first Neo-Babylonian king, Nabopolassar (ruled 627-623 BC), was as aggressive as any Assyrian king and, by all accounts, just as politically savvy. According to the cuneiform historical text known as the “Babylonian Chronicle,” Nabopolassar mustered an army at Babylon in 616 BC and marched north to destroy the Assyrians Nineveh. Ironically, the Assyrians were saved by their once rival, the Egyptians, who, led by their King Psamtek I (ruled 664-610 BC), were able to fight off the Neo-Babylonian attack. 
The Assyrian-Egyptian victory at Nineveh in 616 BC would prove to be ephemeral for King Sin-shar-ishkun (reigned ca. 627-612 BC) (referred to as “Sardanapalus” in the Greek and Roman histories), though, because the enemies of Assyria smelled blood in the water and were lining up to divide the spoils of the once-mighty empire. To build an effective alliance, Nabopolassar reached out to an assortment of Assyria’s enemies, who the Medes led. The strategy for the final victory over the Assyrians and the destruction of Nineveh involved a classic pincer movement whereby the Neo-Babylonians attacked the city from the south and west. At the same time, the Medes and their allies converged from the north and east. The victory for the allies was completed in 612 BC, as was the destruction of Nineveh, which is documented in the Babylonian Chronicle:
Who Destroyed Nineveh?
Instead, the army of the king of Akkad, which had been stationed in the fortress, inflicted a major defeat upon Assyria. The king of Assyria and his army [turned] and went home. In the month Marchesvan the Medes went down to Arraphu and [. . .] The twelfth year: in the month Ab the Medes, after they had marched against Nineveh [. . .] hastened and they captured Tarbisu, a city in the district of Nineveh. . . From the month Sivan until the month Ab – for three [months . . .] they subjected the city to a heavy siege. [On the Nth day] of the month Ab [. . .] they inflicted a major [defeat upon a g]reat [people]. At that time Sin-sharra-ishkun, king of Assyria, [died] . . . They carried off the city's vast booty, and the temple (and)[turned] the city into a ruin heap. 
The classical authors offered a more dramatic version of Nineveh’s fall, where Sin-shar-ishkun burned himself alive with all of his material possessions.  Nineveh’s destruction was also briefly mentioned in the Old Testament of the Bible in the book of Nahum where the prophet states, “Nineveh is of old like a pool of water; yet they shall flee away, Stand, stand, shall they cry; but none shall look back.”  Once Nineveh fell, the Assyrian Empire limped on for another three years before it was finally relegated to the dust bin of history.
Many cities have risen and fallen throughout the course of world history, but few have had such a dramatic history as the ancient Assyrian city of Nineveh. At its height, Nineveh was arguably the most cultured and sophisticated city in the ancient Near East, but a combination of factors led to its quick demise. Dynastic quarrels within the Assyrian royal house precipitated the city’s decline, allowing Assyria’s many enemies to ally and eventually siege and sack the once great capital city of Nineveh.
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