Throughout and before recorded history, Daegu has served as a of transportation, lying as it does at the junction of the Geumho and Nakdong rivers. During the Joseon Dynasty, the city was the administrative, economic and cultural centre of the entire Gyeongsang region, a role largely taken over now by Busan in South Gyeongsang.
Archaeological investigations in the Greater Daegu area have revealed a large number of settlements and burials of the prehistoric Mumun Pottery Period (c. 1500-300 BC.). In fact, some of the earliest evidence of Mumun settlement in Gyeongsang Province have been unearthed in Daegu at Siji-dong and Seobyeon-dong (YUM 1999a). The Dongcheon-dong site is a substantial village of the Middle Mumun (c. 850-550 BC.) and contains the remains of many prehistoric pit-houses and agricultural fields. Megalithic burials (dolmens) have also been found in large numbers in Daegu (YICP 2002).
During the Proto–Three Kingdoms of Korea period, Daegu was the site of a walled-town polity known in historical records as Dalgubeol. The first mention of Dalgubeol is dated to 261. We know nothing of its earlier history, and little of what came later, except that it was absorbed into the kingdom of Silla no later than the 5th century.
Silla defeated the other Three Kingdoms of Korea in the late 7th century, with assistance from Tang China. Shortly thereafter, the king of Silla considered moving the capital from Gyeongju to Daegu, but was unable to do so. We know of this incident through only a single line in the Samguk Sagi, but it is presumed that it indicates the entrenched resistance of the Gyeongju political elites to such a move.
In the late 1990s archaeologists excavated a large scale fortified Silla site in Dongcheon-dong, Buk-gu (FPCP 2000). The site at Locality 2 consists of the remains of 39 raised-floor buildings enclosed by a formidable ditch-and-palisade system. The excavators hypothesize that the fortified site was a permanent military encampment or barracks. Archaeologists also uncovered a large Silla village dating to the 6th to 7th centuries at Siji-dong (YUM 1999b).