Battle of Kilimanjaro
1914 CE.
Shown on the map at -3.076°, 37.353°.
The Battle of Kilimanjaro at Longido took place in German East Africa in November 1914 and was an early skirmish during the East African Campaign of the First World War.
Text from the Wikipedia article Battle of Kilimanjaro, licensed CC BY-SA 4.0.