Early ancient Chinese history is largely legendary, consisting of mythical tales intertwined with sporadic annals written centuries to millennia later. Sima Qian's "Records of the Grand Historian" recorded a period following the Battle of Zhuolu, during the reign of successive generations of confederate overlords () known as the Three Sovereigns and Five Emperors (c. 2852–2070 BCE), who, allegedly, were elected to power among the tribes. This is a period for which scant reliable archaeological evidence exists – these sovereigns are largely regarded as cultural heroes.