"Technology": Chijindum and Chijindum's Code of Laws
The nomadic people who migrated across the Askian Savannah and into the Tu Desert were, for all intents and purposes, perfectly mundane flatland human tribals. They contended with the environment, flora, and fauna exactly as well as one would expect. Indeed, the rate of advancement of the Askian tribes was perfectly average.
There were a number of separate Askian tribes at first. This changed when Chijindum [Author's Note: Igbo for "God holds my life" - us and twin being god eheheh] came of age. Legends say that as a child Chijindum killed an attacking lion with a single blow to the head from a stone held in his hand, and the tales only get more fantastical as time goes on. The facts we've managed to verify still tell quite the story. Chijindum's father was killed by the tribal leader, Chijindum and his mother were exiled from their tribe, and they were forced to shelter with another tribe who was quite wary of outsiders. Chijindum learned how to fight and trained hard and constantly until he'd grown to be an adult as well as the most fearsome warrior of the tribe that had adopted him. His mother had passed of illness a couple of years before Chijindum felt capable of exacting revenge, and with the nights getting longer warriors weren't seeing as much use in general. This left Chijindum with nothing to keep him from setting out toward his old tribe.
Chijindum had played the part of outgoing curious child plenty of times when travelers crossed the tribe's path, and he'd managed to keep track of the migration of his first tribe. He came upon them with a sling and a spear, announced himself, and demanded satisfaction in single combat with his father's killer - who by this point was getting old. Still, the man ran the tribe through fear, and when Chijindum's challenge was announced, a single wave commanded two tribesmen he had as personal guards to club Chijindum to death.
However the fight went, Chijindum gained leadership of his old tribe and used his close ties to his adopted tribe to merge the two while retaining leadership. The uniting into a "supertribe" led to greater needs, which led to settling land, agriculture, and territorial claiming. With the singular tribe settling and expanding rapidly, Chijindum needed to delegate duties to those who could act in his stead. In order to regulate the actions of these Governors it fell upon Chijindum to create the Code of Laws. These nearly 300 rules established standards, fines, and punishments across the tribe, and is the oldest known collection of deciphered writings to date. The Code of Laws was etched onto stone pillars at the center of every village and settlements, and are the clearest indicator of ancient Askian presence.
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For Twin: To clarify, I'm attempting to get a good, popular, not-a-total-dick leader for the people who is most known for his establishment of laws. I left both the fight to take the tribe and the specifics or effects the Code of Laws had extremely vague so that you could define those in the results. I didn't want to write how noble and honorable of a fight Chijindum had if he rolls shit and is an Ancient Hitler.