Ceth spent much of the war as a coordinator for deep-cover agents, his time in the Bothan political class providing him with a wealth of espionage experience. Ceth's role with Black Squadron was much the same, a handler for the unit's growing number of agents.

Originally chief of operations for all deep-cover Rebellion agents in the Galactic core during the lead-up to the battle of Hoth. Openly opposed to the Midrim Offensive, Ceth found himself helpless to stop the great strategic blunder that resulted.
 
With the discovery of the Eclipse by Maximillian Eroun, Madine approached Desulo with the intent of establishing a special task force to eliminate the threat. Ceth agreed, but believed his own skills unsuitable for the command position, electing to take an advisory role.
 
Since Black Squadron's establishment and eventual transformation into Black Fleet, Ceth has remained a steadfast and vital member of the crew. His insights and connections have served to guide the group's efforts in tracking and destroying the ISRG.