Question

can anyone can explain me what is this third millennium BCE is even give some idea about this paragraph

Answer 1

The 3rd millennium BC spanned the years 3000 through 2001 BC. This period of time corresponds to the Early to Middle Bronze Age, in which imperialism, or the desire to conquer, grew to prominence in the city-states of the Middle East and throughout Eurasia. The civilization of Ancient Egypt rose to a peak with the Old Kingdom. World populations estimated to have doubled in the course of the millennium, to some 30 million people.