Possible Clues:

• Military training facility
• Reportedly a seasoned dish for cadets in training?
• Training aid a sailor of bawdy type reportedly used?
• Listened to a sailor going over rough training ground
• Soldiers' training area
• An attack on the entrée is part of the soldier's training
• Perhaps that bit of the meal will be, by the sound of it, offensively pickled
• Soldier training circuit
• A sailor lacking refinement said to get some military training
• Attack method that's used to train soldiers