Great Drought (The Great Lakes)

The Great Drought was century-long a period of abnormally low rainfall that took place in North and Eastern Africa at around around 500,000 BC. This dry spell led to the disappearance of four-fifths of the standing water in Africa at the time, kicking off an accelerated human expansion over the globe. The Olduvai Gorge turned into a dust bowl, forcing early humans to escape the harsh conditions in search of greener lands.

It ended after a century of struggle, the remaining African natives who stuck through the tough period forming Axum.