The first chariot was used extensively , and the Sumerians possessed a dynamic and innovative military .
The cities of Sumer had a legacy of intercity warfare , and the tools of these wars have been found in graves , such as copper axes and blades .
The first chariot was used extensively , and the Sumer possessed a dynamic and innovative military .
The cities of Sumer had a legacy of intercity warfare , and the tools of these wars have been found in graves , such as copper axes and blades .