Stairs Expedition to Katanga Wikipedia
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 mineralrich 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.