Why was the Trent boarding more serious than an ordinary wartime stop of a merchant vessel?
Short answerIts Royal Mail and diplomatic character, combined with the failure to send the ship to prize court, made the seizure a far more serious breach.
NotesNavies did board merchant ships, and a regular neutral vessel might have produced a difficult but manageable prize-law case. Taking such a ship intact to court would at least permit formal adjudication. Trent instead carried Royal Mail and protected diplomatic material, giving the boarding a sovereign dimension absent from the later Asama Maru incident. Fairfax then removed passengers without taking the vessel before a prize court. The combination of protected communications and missing legal procedure made this seizure qualitatively different from a routine wartime stop.