Description: Historical Map of the Area of today's United States 4000 - 1000 B.C.

Credits: The University of Texas at Austin. From the National Atlas of the United States of America (1970). 

Related Maps:   United States Before 5000 B.C.   United States 500 B.C. - 500 A.D.   United States 500 - 1300 A.D.