information:extraction, structural:expansion
400 AD)

Some individual correlates of complex societies are found in the chiefdoms of Korea that date back to c. 700 BC. The best evidence from the archaeological record indicates that states formed between 300 BC and 300/400 AD. However, archaeologists are not prepared to suggest that this means there were states in the BC era. The correlates of state-level societies did not develop as a package but rather in spurts and starts and at various points in time. It was some time between 100 and 400 AD that individual correlates of state societies had developed to a sufficient number and scale that state-level societies can be confidently identified using archaeological data.