The Vietnamese first appeared in history as one of many scattered peoples living in what is now South China and Northern Vietnam just before the beginning of the Christian era. According to local tradition, the small Vietnamese kingdom of Au Lac, located in the heart of the Red River valley, was founded by a line of legendary kings who had ruled over the ancient kingdom of Van Lang for thousands of years. Historical evidence to substantiate this tradition is scanty, but archaeological findings indicate that the early peoples of the Red River delta area may have been among the first East Asians to practice agriculture, and by the 1st century BC they had achieved a relatively advanced level of Bronze Age civilization.