Kaà ¡tiliaà ¡u IV was the twenty-eighth Kassite king of Kar-Duniaà ¡ (Babylon), c. 1232âÂÂ1225 BC. He succeeded à  agarakti-à  uriaà ¡, who could have been his father, ruled for eight years, and went on to wage war against Assyria resulting in the catastrophic invasion of his homeland and his abject defeat.
He may have ruled from the Palace of the Stag and the Palace of the Mountain Sheep, in the city of Dur-Kurigalzu, as these are referenced in a jeweler's archive from this period. Despite his short reign there are at least 177 economic texts dated to him, on subjects as diverse as various items for a chariot, issue of flour, dates, oil and salt for offerings, receipt of butter and oil at the expense of the à ¡andabakku (the governor of Nippur), i.e. his shopping receipt, and baskets received by Rimutum from Hunnubi.
According to his eponymous epic, Tukulti-Ninurta I, king of Assyria, was provoked into war by Kaà ¡tiliaà ¡u's dastardly preemptive attack on his territory, thereby breaching an earlier treaty between their ancestors Adad-nërÃÂri I and Kadaà ¡man-Turgu. But trouble may have been brewing for some time. Tudḫaliya, king of the Hittites, himself reeling from defeat by the Assyrians at the Battle of Nihriya, refers to the Babylonian king as his equal, in his treaty with his vassal, à  auà ¡gamuwa of Amurru, hinting at the possible existence of an alliance or at least a tacit understanding between them. It reads:
Also, Kaà ¡tiliaà ¡u had granted land and presumably asylum to a Hurrian, a fugitive from Assyria's vassal Ḫanigalbat, commemorated on the Tablet of Akaptaḫa. He also reconfirmed a large gift of land on a kudurru that had been provided to Uzub-à  iḫu or -à  ipak by the Kassite king, Kurigalzu II (c. 1332-1308 BC) in grateful recognition of his service in an earlier war against Assyria.
Tukulti-Ninurta petitioned the god à  amaà ¡ before beginning his counter offensive. Kaà ¡tiliaà ¡u was captured, single-handed by Tukulti-Ninurta according to his account, who âÂÂtrod with my feet upon his lordly neck as though it were a footstoolâ and deported him ignominiously in chains to Assyria. The victorious Assyrian demolished the walls of Babylon, massacred many of the inhabitants, pillaged and plundered his way across the city to the Esagila temple, where he made off with the statue of Marduk. He then proclaimed himself âÂÂking of Karduniash, king of Sumer and Akkad, king of Sippar and Babylon, king of Tilmun and Meluhha.â Middle Assyrian texts recovered at modern Tell Sheikh Hamad, ancient Dà «r-Katlimmu, which was the regional capital of the vassal Ḫanigalbat, include a letter from Tukulti-Ninurta to his grand vizier, Aà ¡à ¡ur-iddin advising him of the approach of à  ulman-muà ¡abà ¡i escorting a Babylonian king, who may have been Kaà ¡tiliaà ¡u, his wife, and his retinue which incorporated a large number of women, on his way to exile after his defeat. The journey to Dà «r-Katlimmu seems to have traveled via Jezireh.
The conflict, and its outcome, is recorded in the Tukulti-Ninurta Epic, a poetic âÂÂvictory songâÂÂ, which has been recovered in several lengthy fragments, somewhat reminiscent of the earlier account of Adad-nërÃÂri's victory over Nazi-Maruttaà ¡. It would lend its form to later Assyrian epics such as that of Shalmaneser III, concerning his campaign in Ararat. Written strictly from the Assyrian point of view, it provides a strongly biased narrative. Tukulti-Ninurta is portrayed as an innocent victim of the invidious Kaà ¡tiliaà ¡u, who is contrasted as âÂÂthe transgressor of an oathâÂÂ, and who has so vexed the gods that they have abandoned their sanctuaries.
More succinct accounts of these events are also inscribed on five large limestone tablets which were imbedded in Tukulti-Ninurta's construction projects as foundation stones, for example the Annals of Tukulti-Ninurta, carved on a slab which was buried in or under the wall of his purpose-built capital, Kar-Tukulti-Ninurta.
There is no extant evidence of conflict between Elam and Babylon during his reign. The ruling families had been joined through intermarriage in the past, but the countries had resorted to war to settle their differences under the reigns of Kurigalzu I and possibly Nazi-Maruttaà ¡. However, the sequence of kings of Elam during this period is very confused, with several names suspiciously appearing over again some in shuffled sequences, such as Napirisha-Untash and Untash-Napirisha, making it hard to make sense of the chronology. After Kaà ¡tiliaà ¡u's overthrow, however, Kidin-Hutran III, the king of Elam, certainly led two successive incursions into Babylonia, which have been explained as either indicative of his loyalty to the fallen Kassite dynasty or alternatively raiding with impunity to exploit the weakness of the over-extended Assyrians.
The Chronicle P records that Tukulti-Ninurta ruled through his appointed governors for seven years, where the term à ¡aknà «tÃ«à ¡u could include appointees or prefects. Alternative reconstructions of these events have been proposed whereby Tukulti Ninurta ruled for seven years and then three successive Kassite kings took power before the original dynasty was reinstated or that his own rule followed these kings.
It has been suggested that the à  ulgi Prophecy, a prophecy dated to after the events, might refer to the events during one of these reigns. Enlil-nÃÂdin-à ¡umi may be the subject of Column V of the à  ulgi prophetic speech. It is preserved in heavily damaged late-period tablets, in which à  ulgi (2112âÂÂ2004 BC), the second and most famous king of the third dynasty of Ur, and founder of Nippur, summarizes his achievements. He predicts that Babylon will submit to Assyria, Nippur will be âÂÂcast downâÂÂ, Enlil will remove the king, another king will make a messianic appearance, restore the shrines and Nippur will rise from its ashes.
With the collapse of Tukulti-Ninurta's regime in Babylonia, some years before his assassination, the Kassite rabûti (important men, noblemen, officers?) rebelled and installed Kaà ¡tiliaà ¡u's son, Adad-à ¡uma-uà ¡ur, on the throne.
Kashtiliash is a significant character in S. M. Stirling's Against the Tide of Years and On the Oceans of Eternity, the second and final novels of his Nantucket series. In this alternate history, the intervention of time-traveling Americans turns the tide in the war, Assyria is totally defeated and crushed, and the victorious Kashtiliash eventually marries an American woman who doubles as both his queen and the commander of the modernized Babylonian army, equipped with firearms.