 The Hadza became part of German East Africa, though at the time the colony was proclaimed there is no evidence that Hadzaland had ever been visited by Europeans.The earliest mention of the Hadza in a written account is in German explorer Oscar Baumann's "Durch Massailand zur Nilquelle" (1894).The Hadza hid from Baumann and other early explorers, and their descriptions are based on second hand accounts.