After 2,500 years, these two cities were well-developed and were thriving. As the Sumerians discovered the arts of writing and specialization, the Assyrians quickly adopted these abilities along with building walls to defend themselves from nomadic raiders who came from the mountains.
In the year 2371 B.C., Assyria started a conquest under the Rule of Sargon of Akkad. He was the first king to take over and rule another city besides itself. This conquest took over areas from the north of Ashur to the west of the Mediterranean Sea. He was the first king to have power over another city outside of his own city. After Sargon came Shamshi-Adad I in 1813 B.C. He brought the cities of Ashur, Arbel, and Nineveh together and brought the city Arrapha into Assyrian power. The core of Assyria would be developed from those four cities along with Nimrod. The merchant colonies also saw development in their area. Shamish-Adad I was able to accomplish all of these things though his political skill and the good use of his administrative