Maji Maji Rebellion
The Maji Maji rebellion, sometimes called the Maji Maji War, occurred from 1905 to 1907 and was an armed rebellion against German colonial rule in German East Africa (modern-day Tanzania).  It was initially triggered by a German policy designed to force the indigenous population to grow cotton for export purposes.  The war resulted in 250,000–300,000 total dead, mostly civilians from famine.