Proper noun
Uruk period
(historical) A period between circa 4000 to 3100 BC which saw the emergence of urban life in Mesopotamia and the Sumerian civilization.
Sumerian cities during the Uruk period were probably theocratic and were most likely headed by a priest-king (ensi), assisted by a council of elders, including both men and women. Source: Internet
It is fairly certain that it was during the Uruk period that Sumerian cities began to make use of slave labor captured from the hill country, and there is ample evidence for captured slaves as workers in the earliest texts. Source: Internet
There was little evidence of organized warfare or professional soldiers during the Uruk period, and towns were generally unwalled. Source: Internet
The oldest pictorial record of the Oud dates back to the Uruk period in Southern Mesopotamia over 5000 years ago. Source: Internet