Khashshum, (also given as Ḫaššum, Hassu, Hassuwa or Hazuwan) was a Hurrian city-state located in southern Turkey most probably between the Pyramos river to the north and Aleppo to the south in the vicinity of the southernmost part of the Amanus range.
The city was a vassal to Ebla, it was mentioned in the Tablets of Ebla as Hazuwan, and was governed by its own king. it came under the influence of Mari for a short period of time in the 24th century BC, before Irkab-Damu of Ebla regained influence over the area, the city survived the Akkadians conquests in 2240 BC and flourished as a trade center in the first half of the 2nd millennia BC.
In the beginning of 18th century BC, Khashshum allied with Yamhad against Yahdun-Lim of Mari, it later helped Yamhad against a kingdom in Zalmakum (a marshy region between the Euphrates and lower Balikh), but then shifted alliance to Shamshi-Adad I of Assyria after he annexed Mari and sent him a 1000 troops to attack Sumu-Epuh of Yamhad. later, Yarim-Lim I of Yamhad brought Khashshum under his hegemony, the city remained subjugated to Yamhad until the Hittite conquest.
In the course of his war against Yamhad, Hattusili I of the Hittites, having destroyed Alalakh and Urshu, headed toward Khashshum in his sixth year (around 1644 BC, middle chronology), the city hold out long enough for reinforcement to come, the citizens rallied their forces three times against the Hittites, Yarim-Lim III of Yamhad sent his army under the leadership of General Zukrassi the heavy-armed troops leader accompanied by General Zaludis the commander of the Manda troops, they united with the army of Hashshum, then the battle of Atalur mountain ensued (Atalur is located north of Aleppo not very far from the Amanus, it can be identified with the Kurd-Dagh Mountains), Hattusili destroyed his enemies and moved on to burn and loot Khashshum, he seized the statuses of the god Teshub, his wife Hebat and a pair of silver bulls that were the bulls of Teshub, and carried them to Hattusa, where they were kept in the temple of Arinna.
The king of Khashshum was captured and humiliated, he was harnessed to one of the wagons used to transport the loots of his city and taken to the Hittite capital. a century later, Hittite king Telipinu (fl. c.1500 BC) mentions Khashshum as his chief enemy and his destruction of the city.
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