Chain of Command was one of the holopod simulations presented by Shari yn Yem during the drills she conducted aboard the USS Cerritos in 2381. According to Yem, the simulation was based on the experiences of various other Starfleet crews. (LD: "I, Excretus")
The title of this simulation may be a reference to the Star Trek: The Next Generation episodes "Chain Of Command, Part I" and "Chain Of Command, Part II".