In 1907, the German occupiers of the territory which is now modern Namibia, killed 75,000 tribespeople, as reprisal for uprisings against their rule. This is considered by many to have been the first-ever clearly state-organised genocide. It was also the first genocide of the 20th century.
The victims
65,000 Herero and 10,000 Nama
The perpetrators
German troops under the command of Lieutenant-General Lothar von Trotha, who was under orders from the German Emperor, Wilhelm II (ruled 1888-1918).
Links
Namibian genocide page of the Peace Pledge Union
Socialist Action a good summary of the events, tracing a link to Hitler
Wikipedia entry