Finding the Rat in Camp McCarran! - Fallout: New Vegas
By 2281, the de facto base commander is Colonel James Hsu, who also commands all NCR Army forces in the Mojave. General Lee Oliver, the NCR Army's leader, used to command the base personally, but he relocated to Hoover Dam in anticipation of the coming battle with Caesar's Legion and thus left Hsu fully in command of the garrison.
Fallout New Vegas