Dishonorable discharge

A Dishonorable Discharge is a form of separating a member of the Federation Starfleet from the service. This form of seperation is reserved for those members who have committed serious crimes or violations of regulations. Such discharges are considered dishonorable and shameful by those in Starfleet.

Doctor Julian Bashir was dishonorably discharged from Starfleet following a court martial for his actions in accessing the Shedai meta-genome. Andorian President Kellessar zh'Tarash quickly pardoned him and managed to have Bashir's discharged changed to honorable. ( and )

In an alternate timeline created by Doctor Georges Mordreaux's time travel device Starfleet forced Captain Hunter of the USS Aerfen to accept a dishonorable discharge due in order to keep Mordreaux's work secret. She joined the Free Commandoes and was killed in action a few months later.