Neolithic Subpluvial in North Africa. The Sahara desert region supports a savanna-like environment. Lake Chad is larger than the current Caspian Sea. An African culture develops across the current Sahel region. (jan 1, 7500 BC – jan 1, 3500 BC)
Description:
https://en.wikipedia.org/wiki/African_humid_periodhttps://en.wikipedia.org/wiki/African_humid_period#Humans_of_the_Sahara
Added to timeline:
Date:
jan 1, 7500 BC
jan 1, 3500 BC
~ 4002 years