e/5.9 kiloyear event

Information
has gloss	eng: The 5.9 kiloyear event was one of the most intense aridification events during the Holocene. It ended the Neolithic Subpluvial and probably initiated the desiccation of the Sahara desert. Thus, it also triggered worldwide migration to river valleys, e.g. from central North Africa to the Nile valley, what eventually led to the emergence of first complex, highly organised, state-level societies in the 4th millennium BC.
lexicalization	eng: 5.9 kiloyear event
instance of	(noun) a prolonged shortage; "when England defeated Pakistan it ended a ten-year drought" drought, drouth