The 3rd millennium BC spanned the years 3000 to 2001 BC. This period of time corresponds to the Early to Middle Bronze Age, characterized by the early empires in the Ancient Near East. In Ancient Egypt, the Early Dynastic Period is followed by the Old Kingdom. In Mesopotamia, the Early Dynastic Period is followed by the Akkadian Empire. In what is now Northwest India and Pakistan, the Indus Valley civilization developed a state society.