Split Jack

 is a character who is added to Fallout 3 in the DLC Broken Steel.

He is the leader of a group of bandits which is plaguing the water caravans going from Rivet City to the Capital Wasteland.

Related quest: Protecting the Water Way
Once his name and location has been revealed, the Lone Wanderer can choose to either kill his whole band or replace him by challenging him to a duel with predefined weapons. Additionally, if you have a high enough Speech, you can persuade him to stop high jacking water caravans.

Appearances
Split Jack appears only in the Fallout 3 DLC Broken Steel.