The Phoenician tribes had been eyeing the glorious township of Jayakarta for over a millennia since they had first spotted it, but they had never felt confident in a full raid of the town. Both civilizations had had minor skirmishes with each other but for the most part had kept to themselves. The Javanese people had no interest in grabbing land from the Phoenicians to the north, whose land was mostly swamp and empty forest. No riches were to be had. But as they say, a cornered mouse roars like a lion. The poor have nothing to lose, and the desperate will do anything to get what they want. And so the Phoenicians attacked the Javanese in 2680 BC.
The Phoenicians had come mustering a sizeable army to defeat their millenium-old nemesis, but were surprised to find not only a small force defending the garrison, but also that their foes...were ill-equipped. Their short spears could not do much against the Phoenician's superior armour and shortswords, and not only that, but the Phoenicians had archery techniques over the Javanese. How could the very civilization they were intimidated by not have any strong archery units among their ranks? Aided with archer support, the Phoenicians massacred the Javanese troops, and the town of Jayakarta surrendered in under a week.
From the looks of it, some of the main guard went out of the city just that month in search of game and supplies, just to the Phoenician's luck. Even if the enemy was still out there in the wilderness, it did not matter to the Phoenicians. They would wait for their return and make quick work of them, should they choose to attack. Although they wanted the city, the Phoenicians had no interest in committing genocide on the Javanese. They had important knowledge of fishing and sailing, and knew how to harvest black pearls on the coast, which the Phoenicians had no knowledge about. Assimilation was their ultimate motive, not genocide.
And so, upon taking over the city,the Phoenicians overtime learnt the Javanese language, and over the course of a few centuries, the Phoenician and Javanese language would merge to form a new one, and the city of Jayakarta would be renamed, based off of the abundance of pearls and their beauty: Gaib Ninim. (Gaib=Divine in Javanese, Ninim=Pearls in Hebrew,hebrew seems to be the closest language to the ancient Phoenician language, from what I gather.)