sentences:  Stairs Expedition to Katanga
  
  The Stairs Expedition to Katanga (1891−92), led by Captain William Stairs, was the winner in a race between two imperial powers to claim Katanga, a vast mineral-rich territory in Central Africa for colonization.The mission became notable when a local chief, (Mwenda Msiri), was killed, and also for the fact that Stairs, the leader of one side, actually held a commission in the army of the other.