By the time the Neo-Sumerian Ur-III dynasty collapsed at the hands of the Elamites around the end of the 21st century BC according to the Middle Chronology and mid-20th century according to the Short Chronology following increasing raids by Gutians and Amorites. The native Akkadian-speaking Assyrian kings were now free while Sumer fell under the yoke of the Amorites. The Assyrian king Ushpia who reigned around the 21st century BC is credited with dedicating the first temple of the god Ashur in his home city, although this comes from a later inscription from Shalmaneser I in the 13th century. The temple likely dates to the original settlement of the site when the people of Ashur established their nation under the patronage of the city's god. Soon after in around 2000 BC, Puzur-Ashur I founded a new dynasty, with his successors such as Ilushuma, Erishum I and Sargon I leaving inscriptions regarding the building of temples to Ashur, Adad and Ishtar in the city. Prosperity and independence produced the first significant fortifications in this period. As the region enjoyed relative peace and stability, trade between Mesopotamia and Anatolia increased, and the city of Ashur greatly benefited from its strategic location. Merchants would dispatch their merchandise via caravan into Anatolia and trade primarily at Assyrian colonies in Anatolia, the primary one being at Karum Kanesh (Kültepe).