<page_title> Early Dynastic Period (Mesopotamia) </page_title> <section_title> Periodization </section_title> <table> <cell> ED IIIa <col_header> Period </col_header> </cell> <cell> 2600–2500/2450 <col_header> Middle Chronology All dates BC </col_header> </cell> <cell> ED IIIb <col_header> Period </col_header> </cell> <cell> 2500/2450–2350 <col_header> Middle Chronology All dates BC </col_header> </cell> </table>
ED III is subdivided into the ED IIIa (2600–2500/2450 BC) and ED IIIb (2500/2450–2350 BC).